Scope: handheld bath/shower scrubbing and brushing tools for cleansing/exfoliating the body — plant loofah, natural sea sponge, synthetic mesh puffs, konjac sponges, handled bath/back brushes, dry body brushes, exfoliating mitts. Excludes foot-specific files/pumice (own leaf: foot_files), makeup/face application tools (own leaf: makeup_brushes), and soap/body wash.

Seed:
1. Equivalent of treadwear grade: hygiene_replacement_interval (weeks) — a number dermatologists give as care guidance rather than a listing spec; reliable for natural loofah (3-4wk, two independent dermatologists agree) but loose for synthetic (CC says ~2mo, others only say "less often"), same "compare within one source, not across" catch.
2. Field biologist's first notice: not exfoliation feel (what marketing leads with) but what survives sustained wet, warm use without rotting or breeding bacteria — dry_time_category and biodegradability are the load-bearing facts; texture/stiffness is secondary.

Sources:
[clevelandclinic_loofah] health.clevelandclinic.org/loofahs-can-double-as-bacterial-breeding-grounds — replace natural loofah 3-4wk, plastic ~2mo, dishwasher/bleach-soak cleaning, mold=discard — fetched excerpt
[healthline_loofah] healthline.com/health/loofah-sponge — loofah from Luffa gourd not sea sponge; synthetic poufs are nylon mesh; avoid face/genitals with coarse fiber — fetched excerpt
[yahoo_sajic] yahoo.com/lifestyle/replace-shower-loofah-dermatologist-advice — Dr. Dusan Sajic independently confirms 3-4wk, natural breaks down faster than synthetic — fetched excerpt
[wiki_luffa] en.wikipedia.org/wiki/Luffa — loofah = processed fibrous fruit of Luffa gourd (Cucurbitaceae) — fetched excerpt
[wiki_seasponge] en.wikipedia.org/wiki/Sea_sponge — natural sponge = dried marine Porifera skeleton; most bath "sponges" now synthetic — fetched excerpt
[bassbrushes_materials] bassbrushes.com/post/exploring-long-handle-bath-brush-materials — sisal=firm/durable, boar=soft/gentle, nylon=engineered consistent, quick-drying — fetched excerpt
[baudelaire_sisal] baudelaire.com/bath-body-brushes/sisal-body-brush — sisal brush spec: exfoliation level "Firm", 9in size — fetched excerpt
[abilitysuperstore_brush] abilitysuperstore.com/products/long-handled-wooden-bath-brush — spec: 52cm/20.5in length, 7cm head width — fetched excerpt
[wrightstuff_brush] thewrightstuff.com/long-handle-curved-back-brush — spec: 37in overall, aluminum tube, limited-mobility reach — fetched excerpt
[goodrx_drybrushing] goodrx.com/well-being/alternative-treatments/dry-brushing-lymphatic-drainage — no evidence of lymphatic drainage; exfoliation/circulation plausible only — fetched excerpt
[intothegloss_konjac] intothegloss.com/2014/12/korean-skincare-exfoliate-face-gentle — konjac = 100% konjac root, Jeju Korea, gentle for sensitive/acne skin incl. face — fetched excerpt
[memother_konjac] memotherearthbrand.com/products/vegan-konjac-facial-cleansing-sponge — konjac variants infused with green tea/charcoal/lavender/red clay — fetched excerpt

Branches:
form->loose_scrubber/handled_brush/mitt_or_glove: each has a materially different spec set (fiber vs bristle+handle vs woven glove fiber) — healthline_loofah, bassbrushes_materials.
scrubber_material->konjac_root then_ask grit_additive: konjac is the only scrubber material commonly sold in plain vs. additive-infused variants — memother_konjac.
primary_goal->dry_brushing_circulation then_ask bristle_stiffness, makes_irrelevant texture_coarseness/grit_additive: dry brushing is done without water/soap on a stiff brush, so wet-scrubber texture and grit don't apply — goodrx_drybrushing, bassbrushes_materials.

Noise:
brush head width (7cm, abilitysuperstore) — left out; single data point, not a consistent cross-listing axis, folded conceptually into handle_length as the dimension buyers actually compare.
handle weight (11oz, wrightstuff) — left out; only one brand page states it, no second source, and buyers select by reach/length not mass.
governing safety/test standard — none found; bath scrubbers/brushes aren't CPSC- or FDA-regulated as a product class, so hygiene risk is covered via hygiene_replacement_interval and cleaning_method instead, both sourced to dermatologists rather than a regulator.
sea sponge bath-grade naming (silk/wool/yellow/grass sponge) — left out; Wikipedia's sea sponge article covers biology, not retail grading, and no spec sheet with that vocabulary was fetched; sea_sponge kept as one scrubber_material value.
dual-texture two-sided puffs (soft one side, coarse the other) — left out; a common cosmetic variant but no sourced spec rows found for it; noted only as a seller detail, not a judged facet.

Corrections (2026-10-26):
grit_additive: removed unsupported values rice_powder, walnut_grit — memother_konjac names only green tea/charcoal/lavender/red clay, intothegloss_konjac names no additives.
handle_length: added baudelaire_sisal to evidence — its 9in/23cm spec is the actual source for the range min, previously uncited on this facet.
scrubber_material->plant_loofah branch: removed unsourced makes_irrelevant grit_additive claim — no cited source rules out grit in loofah products.
form->handled_brush branch: added handle_material to then_ask — it only applies to handled brushes and was never actively asked.
vocabulary: renamed "Mesh puff" to "Mesh pouf" to match the wording surfaced in the form split question and scrubber_material's listing_field_hint.
Added facet use_frequency (weekly_or_less/a_few_times_a_week/daily) — bassbrushes_materials' FAQ gives a sourced use-cadence axis the register had no facet for; clevelandclinic_loofah independently caps loofah use at twice a week.