# Supports & Braces

Which joint or body segment a support is built for, and how rigid its structure is, decide what it actually does, not its price. Goal (healing an acute injury, managing a chronic condition like arthritis, preventing re-injury, or correcting posture) decides how much rigidity and immobilization is worth trading against comfort and range of motion.

## How it works

A support or brace is an external structure, elastic, semi-rigid with stays, or rigid with a shell or hinge, fitted over a joint or body segment. It works by limiting or redirecting motion at the joint, compressing soft tissue, or redistributing mechanical load away from a damaged area (an 'unloader' knee brace uses a three-point force system to shift load off one compartment). More rigidity and more restriction mean more protection for healing or unstable tissue, at the cost of comfort, bulk, and all-day wearability; closure type (pull-on, straps, lacing) sets how precisely that structure can be fitted to the body.

## How an expert narrows the choice

```mermaid
timeline
  section 1 · Body part
    knee : ask Knee hinge type, Patella opening : skip Back brace structure, Ankle support style, Wrist/hand coverage, Shoulder support type, Elbow brace type, Cervical collar rigidity
    back_or_torso : ask Back brace structure : skip Knee hinge type, Patella opening, Ankle support style, Wrist/hand coverage, Shoulder support type, Elbow brace type, Cervical collar rigidity, Side fit
    ankle : ask Ankle support style : skip Knee hinge type, Patella opening, Back brace structure, Wrist/hand coverage, Shoulder support type, Elbow brace type, Cervical collar rigidity
    wrist_or_hand : ask Wrist/hand coverage : skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Shoulder support type, Elbow brace type, Cervical collar rigidity
    elbow : ask Elbow brace type : skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Wrist/hand coverage, Shoulder support type, Cervical collar rigidity
    shoulder : ask Shoulder support type : skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Wrist/hand coverage, Elbow brace type, Cervical collar rigidity
    neck : ask Cervical collar rigidity : skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Wrist/hand coverage, Shoulder support type, Elbow brace type, Side fit
  section 2 · Main goal
    Injury, surgery recovery, a condition, re-injury prevention, or posture?
```

1. **Body part.** Which body part — knee, back, ankle, wrist, elbow, shoulder, or neck?
   Each body part has its own defining spec (hinge type for knees, stays for backs, collar rigidity for necks); nothing else can be asked usefully before this.
   If knee: ask Knee hinge type, Patella opening; skip Back brace structure, Ankle support style, Wrist/hand coverage, Shoulder support type, Elbow brace type, Cervical collar rigidity.
   If back_or_torso: ask Back brace structure; skip Knee hinge type, Patella opening, Ankle support style, Wrist/hand coverage, Shoulder support type, Elbow brace type, Cervical collar rigidity, Side fit.
   If ankle: ask Ankle support style; skip Knee hinge type, Patella opening, Back brace structure, Wrist/hand coverage, Shoulder support type, Elbow brace type, Cervical collar rigidity.
   If wrist_or_hand: ask Wrist/hand coverage; skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Shoulder support type, Elbow brace type, Cervical collar rigidity.
   If elbow: ask Elbow brace type; skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Wrist/hand coverage, Shoulder support type, Cervical collar rigidity.
   If shoulder: ask Shoulder support type; skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Wrist/hand coverage, Elbow brace type, Cervical collar rigidity.
   If neck: ask Cervical collar rigidity; skip Knee hinge type, Patella opening, Back brace structure, Ankle support style, Wrist/hand coverage, Shoulder support type, Elbow brace type, Side fit.
   Skip if already known: a query that already names the joint or body part, e.g. 'knee brace' or 'wrist splint'.

2. **Main goal.** Injury, surgery recovery, a condition, re-injury prevention, or posture?
   Goal sets how much rigidity is worth the loss of comfort: a fresh injury or post-surgical recovery wants maximum immobilization, prevention wants a light sleeve, and chronic conditions want sustained support an active person can tolerate all day.
   Skip if already known: an earlier answer naming an injury, a diagnosis like arthritis, a sport, surgery, or posture.

## What to surface

### Body part

Which joint or body segment the support is shaped to fit: knee, back/torso, ankle, wrist/hand, elbow, shoulder, or neck. It is the single biggest branch point: a knee brace's hinge and patella cutout, a back brace's stays, and a cervical collar's shell have nothing in common, so nothing else about fit or function can be evaluated before this is known. [5] [1]

Values: knee, back_or_torso, ankle, wrist_or_hand, elbow, shoulder, neck.
Question to ask: Which body part — knee, back, ankle, wrist, elbow, shoulder, or neck?

Used as: top-level split, filter. Data: on the listing, backfill cost low. Look for it as: Almost always in the title and category breadcrumb ('Knee Brace', 'Lumbar Back Support', 'Wrist Splint').
Title and category keyword match covers nearly every listing.

### Main goal

What the buyer mainly needs the support to do: support a recent injury, manage a chronic condition like arthritis, prevent re-injury during activity, or correct posture. Goal decides where on the rigidity spectrum to land: acute and post-surgical needs want maximum restriction even at the cost of comfort, prevention wants the lightest brace that still helps, and chronic management wants something tolerable for all-day, every-day wear. [3] [14]

Values: acute_injury_support, chronic_condition_management, post_surgical_immobilization, preventive_or_athletic, posture_correction.
Question to ask: Injury, surgery recovery, a condition, re-injury prevention, or posture?

Used as: top-level split, filter. Data: needs research, backfill cost medium. Look for it as: Usually implied by the product's marketed use case ('post-op knee immobilizer', 'arthritis knee sleeve', 'athletic ankle brace') rather than a stated field.
Keyword-match the title against the five values; titles naming a sport or 'athletic' default to preventive_or_athletic, titles naming arthritis or osteoarthritis default to chronic_condition_management.

### Rigidity

How much the support restricts motion: a soft elastic sleeve or wrap, a semi-rigid design with removable stays or panels, or a rigid design with a hard shell or mechanical hinge. Rigidity is the direct trade between protection and comfort: rigid designs immobilize and protect healing or unstable tissue best but are bulkiest and hardest to wear all day; soft designs are the most comfortable but offer the least structural protection. [10] [8]

Values: soft_elastic, semi_rigid_with_stays, rigid_shell_or_hinge.
Question to ask: Soft sleeve, semi-rigid with stays, or rigid hinged/shell?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Usually in the title or bullet points ('rigid', 'hinged', 'with stays', 'flexible support').
Title keyword match; default to soft_elastic when the title says nothing, since plain sleeves are the most common listing.
Chart: position on a rigidity axis from soft to rigid.

### Closure

How the support goes on and stays fitted: pull-on with no fasteners, hook-and-loop straps, lace-up, a buckle/clip strap, or a single-hand dial/ratchet dosing system. Closure decides how precisely the fit can be adjusted and how easy the support is to put on one-handed or over a cast or swelling; a dial or ratchet gives the finest single-hand adjustment, straps and lacing let a buyer dial in compression by hand, and a plain pull-on sleeve cannot be tightened at all. [14] [5] [3]

Values: pull_on_sleeve, hook_and_loop_straps, lace_up, buckle_or_clip, dial_or_ratchet.
Question to ask: Pull-on, straps, lace-up, buckle, or a dial?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Almost always visible in product photos and named in the title ('pull-on', 'adjustable straps', 'lace-up', 'dial', 'Boa').
Title keyword match covers most listings; 'dial' or 'Boa' marks dial_or_ratchet; image inspection resolves the rest.

### Sizing method

Whether the support is one-size-fits-most, sized by letter (S/M/L), or fitted by a measured body circumference. A support that relies on a measured circumference (around the knee, calf, or wrist) fits far more precisely than a lettered or universal size, which matters most for rigid or hinged designs where a loose fit lets the joint move exactly the way the brace is meant to stop. [4]

Values: one_size_universal, lettered_sizes, measured_circumference.
Question to ask: One size fits most, S/M/L sizing, or does it need a measurement?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Stated in the size chart or title ('one size', 'S/M/L', 'measure your knee circumference, see chart').
Presence of a size chart with a tape-measure instruction marks measured_circumference; otherwise match the title's size words.

### Side fit

Whether the support is made for the left side, the right side, or fits either side (bilateral/universal). Rigid and hinged designs for paired limbs (knee, ankle, wrist, elbow, shoulder) are often handed because the hinge or support structure sits on one side of the joint; ordering the wrong side on a handed design means it does not brace the joint correctly. [4]

Values: left, right, bilateral_or_universal.
Question to ask: Left side, right side, or does it fit either?

Used as: filter. Data: on the listing, backfill cost low. Look for it as: Stated in the title or variant selector for hinged/rigid designs ('Left Knee', 'Right Ankle'); sleeves and wraps usually just say 'universal'.
Title keyword match for 'left'/'right'; default to bilateral_or_universal when absent.

### Material

What the support's main body is made of: neoprene, elastic knit fabric, breathable mesh, or a rigid plastic/metal shell or stay. Neoprene retains heat and compresses well but traps sweat; breathable knit or mesh is cooler for long wear; a rigid shell or metal stay is what actually gives a rigid or semi-rigid design its structure. [10] [4]

Values: neoprene, elastic_knit_fabric, breathable_mesh, rigid_plastic_or_metal, mixed.
Question to ask: Neoprene, stretchy fabric, breathable mesh, or a rigid shell?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Almost always in the title or bullets ('neoprene knee sleeve', 'breathable mesh back support').
Title keyword match covers most listings.
Chart: position on a breathability axis, mesh highest, neoprene lowest.

### Knee hinge type

For knee braces: no hinge (sleeve), a single hinge on one or both sides, a double-hinged range-of-motion-adjustable hinge, or an unloader/offloading design. Hinges are what let a rigid knee brace control lateral stability and limit a specific range of motion after a ligament injury; an unloader design instead uses a three-point force system to shift load off one side of the joint, which is what osteoarthritis bracing needs instead of motion control. [3] [4]

Values: unhinged_sleeve, single_hinged, double_hinged_rom_adjustable, unloader_offloading.
Question to ask: No hinge, a basic hinge, adjustable ROM, or an unloader design?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title for hinged and unloader products ('hinged knee brace', 'ROM adjustable', 'unloader knee brace'); sleeves simply omit it.
Title keyword match; default to unhinged_sleeve when none of the hinge/unloader keywords appear.
Chart: position on a motion-control axis, unloader and double-hinged highest.

### Back brace structure

For back/torso supports: an elastic belt with no added support, a flexible design with removable rigid stays or panels, or a rigid thoracolumbosacral (TLSO) shell or corset-style brace. This is the rigidity spectrum specific to back braces: a plain elastic belt mainly reminds the wearer to lift and sit correctly, removable stays add real spinal support while staying flexible enough for daily wear, and a rigid TLSO shell is built to restrict spinal motion substantially, the level typically used after injury or surgery rather than for everyday posture. [10]

Values: elastic_belt_no_stays, flexible_with_removable_stays, rigid_tlso_or_corset.
Question to ask: Plain elastic belt, flexible with stays, or a rigid shell?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Usually named in the title ('lumbar support belt', 'back brace with stays', 'TLSO back brace').
Title keyword match; default to elastic_belt_no_stays when no stay or shell keyword appears.
Chart: position on the rigidity axis, elastic lowest, rigid TLSO highest.

### Ankle support style

For ankle supports: a stretch sleeve, a lace-up brace, a semi-rigid brace with side stays, or a rigid stirrup-style shell. Research on ankle sprains finds semi-rigid or lace-up braces reduce the chance of re-injury in high-risk sports better than plain taping or a stretch sleeve, which is why the brace style, not just 'ankle support' as a category, is what a returning athlete should be choosing on. [14]

Values: stretch_sleeve, lace_up, semi_rigid_with_stays, rigid_stirrup_shell.
Question to ask: A stretch sleeve, lace-up, semi-rigid with stays, or a rigid stirrup shell?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title ('lace-up ankle brace', 'ankle stabilizer with stays', 'stirrup ankle brace').
Title keyword match; default to stretch_sleeve when no lace, stay, or stirrup keyword appears.
Chart: position on the rigidity axis, stretch sleeve lowest, rigid stirrup highest.

### Shoulder support type

For shoulder supports: a sling alone, a sling-and-swathe or full immobilizer that also binds the arm to the torso, a figure-8 strap for the collarbone, or a stability brace with straps for an active, unstable shoulder. A plain sling limits shoulder and elbow movement for general healing, but a dislocation or clavicle fracture often needs the arm bound to the body (a sling-and-swathe or immobilizer) for real restriction, while a figure-8 strap is specifically for a broken collarbone, not a shoulder injury; prolonged sling use on its own carries a real risk of the shoulder stiffening into a frozen shoulder. [12] [7]

Values: sling_only, sling_and_swathe_or_immobilizer, figure_8_clavicle_strap, stability_brace_with_straps.
Question to ask: A sling, a full immobilizer, a collarbone strap, or a stability brace?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title ('arm sling', 'shoulder immobilizer', 'clavicle strap', 'shoulder stability brace').
Title keyword match; 'immobilizer' or 'sling and swathe' marks the second value, 'clavicle' or 'collarbone' marks the third.

### Latex content

Whether the support's elastic components are latex-free, contain latex, or the material is unspecified. Natural rubber latex in elastic straps or sleeves can trigger a serious allergic reaction in sensitized wearers, a known risk with medical wearables worn directly on skin for hours. [1]

Values: latex_free, contains_latex, unspecified.
Question to ask: Does it need to be latex-free?

Used as: filter. Data: on the listing, backfill cost low. Look for it as: Stated as a callout or bullet ('latex-free') when true; rarely stated when the material does contain latex.
Presence of a 'latex-free' callout marks latex_free; otherwise mark unspecified rather than assuming contains_latex.

### Regulatory class

Whether the support is sold as an FDA Class I exempt limb/body orthosis (brace), the classification that covers nearly all over-the-counter supports and braces in this leaf. It explains why these products need no premarket clearance and rarely carry a cleared-device number on the listing: FDA's 21 CFR 890.3475 treats a 'limb orthosis (brace)' worn to support, correct, or prevent deformity as Class I and exempt from premarket notification, so expertise here comes from fit and construction, not from a regulatory approval to check. [1] [2]

Values: fda_class_I_exempt_orthosis, not_applicable_or_unspecified.

Used as: shown on the card. Data: needs research, backfill cost low. Look for it as: Not a listing field; almost never stated because exempt devices carry no clearance number.
Default fda_class_I_exempt_orthosis for all non-powered supports/braces/collars/splints/slings in this leaf.

### Wrist/hand coverage

For wrist and hand supports: wrist-only (a volar wrist splint), a thumb spica that also immobilizes the thumb, or a full hand-and-wrist wrap. A plain wrist splint (the volar type) supports the wrist in a neutral position for conditions like carpal tunnel, while a thumb spica adds a rigid extension to immobilize the thumb specifically, needed for thumb-joint arthritis or De Quervain's tendinitis; using the wrong one leaves the actual painful joint unsupported. [13]

Values: wrist_only_volar_splint, thumb_spica, full_hand_and_wrist_wrap.
Question to ask: Wrist only, a thumb spica, or a full hand-and-wrist wrap?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title ('wrist splint', 'thumb spica splint', 'hand and wrist brace').
Title keyword match; 'thumb' in the title marks thumb_spica.

### Elbow brace type

For elbow supports: a compression sleeve, a counterforce strap worn over the forearm muscle, a wrist-extension orthosis that controls the wrist instead, or a hinged range-of-motion brace. Tennis elbow treatment uses two different mechanisms: a counterforce strap reduces strain on the forearm tendon at its source, while a wrist extension orthosis works by controlling the wrist instead; a hinged ROM brace is a different category entirely, used after an elbow injury or surgery to limit joint motion rather than treat tendon overuse. [11]

Values: compression_sleeve, counterforce_strap, wrist_extension_orthosis, hinged_rom_brace.
Question to ask: A compression sleeve, a counterforce strap, a wrist brace, or hinged ROM?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title ('tennis elbow strap', 'elbow compression sleeve', 'hinged elbow brace').
Title keyword match; 'strap' or 'counterforce' marks counterforce_strap, 'hinged' marks hinged_rom_brace.

### Cervical collar rigidity

For neck supports: a soft foam collar, or a rigid collar with a hard plastic shell secured by straps. A soft collar is flexible and the least restrictive, mainly used for comfort and reminding the wearer to limit movement; a rigid collar with a hard plastic shell restricts neck flexion substantially more and is the type used for suspected injury, not everyday neck pain, so using the wrong one either under- or over-restricts the neck. [8]

Values: soft_foam_collar, rigid_shell_collar.
Question to ask: A soft foam collar, or a rigid plastic-shell collar?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title ('soft foam cervical collar', 'rigid neck brace').
Title keyword match; default to soft_foam_collar, the far more common consumer listing.
Chart: position on the rigidity axis, soft lowest, rigid shell highest.

### Compression level

How much the support compresses the covered body part: light, moderate, or firm/graduated compression. Higher compression increases circulation support and swelling control but firm, graduated compression garments are the ones clinically treated as a prescription-level product; most everyday sleeves sit at light-to-moderate compression, which is what makes them comfortable for all-day wear. [9]

Values: light, moderate, firm_graduated, unspecified.
Question to ask: Light, moderate, or firm compression?

Used as: filter, shown on the card. Data: needs research, backfill cost medium. Look for it as: Rarely a stated field outside dedicated compression-sleeve brands; sometimes implied by marketed use ('graduated compression').
Default to light for plain sleeves/wraps and moderate for products explicitly marketed as 'compression'; mark unspecified otherwise.
Chart: position on a compression axis, light to firm.

### Patella opening

For knee braces: whether the fabric is cut open around the kneecap, closed over it, or padded with a horseshoe-shaped ring around it. An open or horseshoe patella design keeps direct pressure off the kneecap itself while still compressing the surrounding tissue, which matters for kneecap-specific pain (like patellar tendinitis); a closed design compresses the whole joint uniformly. [4]

Values: open_patella, closed_patella, horseshoe_pad.
Question to ask: Open around the kneecap, fully closed, or a horseshoe pad around it?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title or bullets ('open patella', 'closed patella knee sleeve').
Title keyword match; default to closed_patella when unstated, the more common basic sleeve design.

### Unloader compartment

For unloader/offloading knee braces only: whether the brace is built to offload the medial (inner) or lateral (outer) knee compartment, or not applicable for a non-unloader brace. An unloader brace applies its 3-point force in one direction only, so a medial-compartment brace and a lateral-compartment brace are not interchangeable: fitting the wrong one offloads the healthy side of the joint instead of the arthritic one. [6] [3]

Values: medial, lateral, not_applicable.
Question to ask: Medial (inner) or lateral (outer) compartment OA?

Used as: filter, shown on the card. Data: on the listing, backfill cost low. Look for it as: Named in the title or variant selector for unloader lines ('medial unloader knee brace', 'lateral OA knee brace'); omitted entirely on non-unloader knee braces.
Mark not_applicable unless knee_hinge_type is unloader_offloading; for unloader listings, title keyword match 'medial' or 'lateral'.

## What you give up

- A rigid or hinged brace, whether it is a TLSO back shell, a double-hinged knee brace, or a rigid cervical collar, restricts motion the most and protects healing or unstable tissue the best, but it is bulkier, hotter, and harder to wear all day than a soft sleeve or wrap. [10] [8] Board branch: "More rigidity, less comfort".
- Semi-rigid or lace-up ankle braces measurably cut the odds of a repeat ankle sprain in high-risk sports compared to taping or a plain stretch sleeve, but that protection comes from added structure a sleeve does not have. [14] Board branch: "More re-injury protection, less minimal feel".

## Words you will meet

- **Orthosis**. The medical term for a brace: an external device worn to support, correct, or prevent deformity in a body part.
- **Unloader brace**. A knee brace that uses a three-point force system to shift weight-bearing load off one side of the joint, used for knee osteoarthritis.
- **ROM (range of motion)**. How far a joint is allowed to bend; an 'ROM-adjustable' hinge lets a clinician or wearer set limits on that range.
- **Stays**. Rigid plastic or metal strips sewn into a flexible brace to add structure without making the whole thing rigid.
- **TLSO**. Thoracolumbosacral orthosis: a rigid brace that covers the chest, lower back, and hips to restrict spinal motion.
- **Counterforce strap**. A strap worn around the forearm just below the elbow that reduces strain on the tendon, used for tennis elbow.
- **Thumb spica**. A splint that extends past the wrist to immobilize the thumb as well, used for thumb-joint pain.
- **Volar**. On the palm side of the wrist or forearm; a 'volar wrist splint' sits against the inside of the wrist.
- **Stirrup brace**. A rigid U-shaped ankle brace, open at the heel, that wraps up both sides of the ankle like a horse's stirrup.
- **Sling and swathe**. An arm sling combined with a second strap that binds the arm against the torso, restricting the shoulder more than a sling alone.
- **Cervical collar**. A collar worn around the neck to limit its movement, ranging from soft foam to a rigid plastic shell.
- **Compression (mmHg)**. How firmly a garment squeezes the body, measured in millimeters of mercury; higher numbers mean firmer compression.
- **Open patella**. A knee sleeve design with a hole cut out over the kneecap so it floats free instead of being compressed.
- **Neoprene**. A synthetic rubber material used in many sleeves and wraps; it compresses well and retains heat but traps sweat.
- **Class I (device)**. An FDA risk category for the lowest-risk medical devices; most require no premarket approval before being sold.
- **Premarket notification**. The FDA clearance process (also called a 510(k)) that some devices must pass before sale; Class I braces are exempt from it.
- **Graduated compression**. Compression that is tightest at the end furthest from the heart and loosens closer to it, to help push fluid back toward the body.
- **De Quervain's tendinitis**. A painful inflammation of the tendons on the thumb side of the wrist, often needing a thumb-immobilizing splint.
- **Patellar tendinitis**. Inflammation of the tendon connecting the kneecap to the shin bone, causing pain centered on the kneecap itself.

## Where we made a call

- Semi-rigid or lace-up ankle braces reduce the risk of repeat ankle sprains in high-risk sports better than taping alone. (confidence medium). Single-sourced to a Wikipedia synthesis of cited injury-prevention studies; the underlying sports-medicine trials themselves were not fetched this run. [14]
- Unloader knee braces redistribute load via a 3-point force system. (confidence medium). Both citations (ossur_unloader, ossur_nav) are the same vendor, not independent corroboration; the mechanism is also described on Ossur's own clinical-research page, still one vendor. [3] [4]

## References

1. [21 CFR 890.3475 — Limb orthosis](https://www.ecfr.gov/current/title-21/chapter-I/subchapter-H/part-890/subpart-D/section-890.3475) (regulator). Supports: Defines a limb orthosis (brace) and classifies it Class I, exempt from premarket notification.
2. [21 CFR 890.3475 (GPO official XML)](https://www.govinfo.gov/content/pkg/CFR-2023-title21-vol8/xml/CFR-2023-title21-vol8-sec890-3475.xml) (regulator). Supports: Identical identification and Class I exempt classification text, second source for the regulatory claim.
3. [Össur Unloader Braces](https://www.ossur.com/en-us/bracing-and-supports/unloader/unloader-braces) (spec sheet). Supports: Unloader knee braces use a three-point force system to redistribute load off the affected knee compartment for osteoarthritis.
4. [Össur Knee Braces](https://www.ossur.com/en-us/knee/knee-braces) (spec sheet). Supports: Hinged knee brace, neoprene wraparound hinged knee support, and ACL functional bracing are distinct product lines; Knee braces are sold sided and sized by measurement.
5. [Mueller Sports Medicine — Back Brace for Lower Back Pain catalog](https://www.muellersportsmed.com/b2c-us/en/Open-Catalogue/By-Body-Part/Back-Brace-for-Lower-Back-Pain/c/5) (spec sheet). Supports: Brand's own body-part catalog taxonomy: knee, ankle, elbow, back, shoulder, wrist, hand/thumb, thigh, shin/calf, foot.
6. [Össur — Unloader brace research summary](https://www.ossur.com/en-us/bracing-and-supports/unloader/research-unloader-braces) (spec sheet). Supports: Unloading braces apply a varus or valgus force to reduce load on the knee's lateral or medial compartment respectively.
7. [AAOS OrthoInfo — Frozen Shoulder](https://orthoinfo.aaos.org/en/diseases--conditions/frozen-shoulder/) (primer). Supports: Frozen shoulder can develop after a shoulder is immobilized for a period of time due to surgery, fracture, or injury.
8. [Cervical collar](https://en.wikipedia.org/wiki/Cervical_collar) (primer). Supports: Soft collars are flexible and least restrictive; rigid collars use a hard plastic shell; Rigid collars are most restrictive in flexion compared to soft collars.
9. [Compression garment](https://en.wikipedia.org/wiki/Compression_garment) (primer). Supports: Compression of 20-30 mmHg or higher typically requires a doctor's prescription.
10. [Back brace](https://en.wikipedia.org/wiki/Back_brace) (primer). Supports: Back braces fall into rigid, semi-rigid, and flexible categories; TLSO and corset brace are named sub-types; Semi-rigid braces add removable rigid stays or padding to an otherwise flexible brace body.
11. [Tennis elbow](https://en.wikipedia.org/wiki/Tennis_elbow) (primer). Supports: Counterforce orthosis and wrist extension orthosis are the two main elbow-brace treatment types for tennis elbow.
12. [Sling (medicine)](https://en.wikipedia.org/wiki/Sling_(medicine)) (primer). Supports: A sling limits shoulder and elbow movement; indicated for dislocation, clavicle fracture, and AC joint separation; Prolonged shoulder sling use carries a risk of frozen shoulder.
13. [Splint (medicine)](https://en.wikipedia.org/wiki/Splint_(medicine)) (primer). Supports: Thumb spica, volar wrist splint, and ulnar gutter are distinct named splint types for the thumb, wrist, and forearm.
14. [Sprained ankle](https://en.wikipedia.org/wiki/Sprained_ankle) (primer). Supports: Semi-rigid or lace-up ankle braces reduce reinjury risk better than taping in high-risk sports within the first 6-12 months.