Underwear has the most direct, all-day skin contact of anything in your closet. We surface the highest-scoring underwear in our catalog and explain which fibers and finishes to avoid.
Independent testing has flagged PFAS and other chemical residues in some performance and stain-resistant underwear. Shedding synthetics also release microplastics each wash. Natural fibers without performance finishes are the safer default.
These score better on microplastics, biodegradability, or shedding for underwear. Tap into a material guide for the full breakdown.
112 visible scored products match this category.
Brand: PACT
Brand: MARO
Brand: Pact
Brand: Pact
Brand: Pact
Brand: Pact
Brand: Pact
Brand: Pact
Brand: Pact
Brand: KENT
Brand: TEMPLE
Brand: Nest
Brand: Ryker
Brand: MATE the Label
Brand: Pact
Brand: Pact
Brand: ORGANICKID
Brand: Mighty Good Basics
Brand: La Coochie
Brand: IOAN
Brand: J.Crew
Brand: PACT
Brand: MATE the Label
Brand: Subset
See how popular underwear brands stack up and find higher-scoring picks.
Have a specific underwear item in mind? Paste the product URL into the analyzer or paste the fabric label into the homepage checker. Both work without an account.
Greener Closet treats underwear as non-toxic when the fiber composition avoids high-shedding synthetics, when there is no evidence of PFAS-based water- or stain-repellent finishes, and when the manufacturing inputs score reasonably on microplastics, half-life, shedding, and energy. Independent testing has flagged PFAS and other chemical residues in some performance and stain-resistant underwear. Shedding synthetics also release microplastics each wash. Natural fibers without performance finishes are the safer default.
Look for Organic Cotton, Modal, Tencel Lyocell. These score better on microplastics, biodegradability, or shedding compared with the petroleum-based synthetics that dominate this category.
Be cautious with Polyester, Nylon, Elastane, especially when they appear with stain- or water-resistant finishes. These materials drive most of the score pressure for underwear.
Each product is scored from the full material label and any available certifications. The scoring weights microplastics at 45%, PFAS at 15%, half-life and biodegradability at 15%, energy at 10%, azo dyes at 10%, and fiber shedding at 5%.