Health topic

Plastic-free underwear

Underwear is the worst-case skin contact category — direct contact with the most absorbent skin on your body, all day, every day, sometimes wet from sweat. Synthetic underwear means plastic + plasticizer residues + any antimicrobial finishes are doing maximum hours against your most sensitive tissue.

·100% cotton, merino wool, and hemp underwear are the safest defaults.
·Avoid antimicrobial-treated synthetic underwear — silver nanoparticles and triclosan are common finishes with documented health concerns.
·Sweat increases dermal absorption of any plasticizer residues in the fabric.
·Even small amounts of spandex (≤5%) for fit don't meaningfully change the skin-contact profile.

Westerhoff et al. (2008). Antimony leaching from PET — feedstock context for trace antimony in PET-based polyester.

Plastic-free underwear in our catalog

30 products matching this topic, sorted by Health Impact. Methodology on /health.

Minus33

Test Lab: Batch 496 Lightweight Men's Boxer Brief - 100% Merino Wool

100% Merino Wool

Quality AHealth AUnderwear$34.99

Icebreaker

Men's Merino 175 Everyday Boxers wFly

100% Merino Wool

Quality AHealth AUnderwear$50.00

Minus33

Lightweight Men's Boxer Brief - 100% Merino Wool

100% Merino Wool

Quality AHealth AUnderwear$44.99

Minus33

Lightweight Merino Boxer Brief 3 Pack

100% Merino Wool

Quality AHealth AUnderwear$134.97

Paka

Women's Essential Scoop Bralette

46% Tencel, 48% Tencel

Quality BHealth AUnderwear$45.00

MUJI

Lyocell Blend Front Open Trunks

50% Cotton, 50% Lyocell

Quality BHealth AUnderwear$9.90

Icebreaker

Men's Merino Blend 125 Cool-Lite™ Anatomica Boxers

56% Tencel, 40% Merino Wool, 4% Elastane

Quality BHealth AUnderwear$55.00

MUJI

Lyocell Blend Low Rise Boxer Briefs

95% Lyocell, 5% Spandex

Quality BHealth AUnderwear$9.90

MUJI

Lyocell Blend Front Open Boxer Briefs

95% Lyocell, 5% Spandex

Quality BHealth AUnderwear$9.90

MUJI

Men's Smooth Low Rise Boxer Brief

Lyocell 95%, Spandex 5%

Quality BHealth AUnderwear$9.90

MUJI

Men's Smooth Front Open Boxer Brief

Lyocell 95%, Spandex 5%

Quality BHealth AUnderwear$9.90

Pact

Everyday Extended Boxer Brief 4-Pack - Midnight Harbor