Clothing & underwear
Underwear, base layers and everyday clothes made from natural fibers without PFAS or antimicrobial finishes.
What we look for
We look for
- Certified textiles: GOTS organic or OEKO-TEX Standard 100, with a certificate number we can look up, or the maker listed by name in the GOTS database for that kind of product.
- Natural fibers next to skin: cotton, wool, alpaca, linen or silk, with any elastane or nylon percentage stated.
- No PFAS finishes: no stain-, water- or odor-repellent treatments, or a statement that none are used.
- No antimicrobial finishes: no silver, triclosan or “odor-control” chemistry in fabric worn all day.
- Dyes and trims named: undyed or low-impact dyes, and the elastic and thread materials stated.
We avoid
- Period and leak-proof underwear without a named lab’s PFAS or total-fluorine report for the style sold.
- “Antibacterial” or “odor-free” fabrics that do not say how.
- “Natural” or “eco” labels with no fiber breakdown.
Read the research
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6 products · best rated first
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CottoniqueCottonique Men’s Rib Boxer Brief with Fly
100% organic cotton rib boxer briefs with latex-free, spandex-free elastic, from a GOTS-licensed maker. The thread has a polyester core. The GOTS database shows a Nov 2026 expiry; Cottonique’s certificate runs to Nov 2027. GOTS: Essential Layer Inc (Cottonique), license GOTS-28166 (IDFL) -
CottoniqueCottonique Women’s Bikini Brief (2-pack)
100% organic cotton briefs with latex-free, spandex-free elastic, from a GOTS-licensed maker that names its thread and label. The GOTS database shows a Nov 2026 expiry; Cottonique’s own certificate runs to Nov 2027. GOTS (IDFL, GOTS-28166) · Certified B Corporation (company, not product) -
PactPact Organic Everyday Classic Fit Bikini
A low-cost organic cotton bikini from a brand listed in the GOTS database. Pact says it is made without PFAS or toxic dyes, but names no elastic, thread or dye. The fabric has 5% elastane. GOTS: Wear Pact, LLC, license GOTS-33073 (Control Union) -
SubsetSubset Organic Cotton Mid-Rise Brief
Organic cotton briefs from Subset (formerly Knickey), listed in the GOTS database. The page names its elastics: nylon and elastane. It gives no certificate number, and the dyes and thread are not described. GOTS: 529 LLC dba Subset, license GOTS-21368 (Control Union) -
PakaPaka Essential Tee
A tee of 85% organic Pima cotton and 15% alpaca with no spandex, made in Peru. The fiber list is clear. Paka’s OEKO-TEX and organic claims give no certificate numbers, so we could not check them. Certified B Corporation: Paka (company, not product), per B Lab’s directory -
SaaltSaalt Leakproof Cotton Brief
Period underwear from a maker that publishes lab reports: an SGS report from 2023 that lists a Cotton Brief found no fluorine; later reports cover other items. The gusset is polyester, and no certificate number is given.