Sweat Makes PFAS in Kids' Clothing Absorb Faster

Your child's raincoat or sports shirt may be drenching them in PFAS. A 2025 study found that sweating amplifies how much PFAS gets absorbed through the skin from treated clothing, especially in children.

What Researchers Measured

Published in a 2025 study, researchers analyzed 28 different PFAS compounds and 9 organophosphorus compounds in children's clothing. They found that sweat significantly increased the transfer of PFAS from treated fabric to skin. Children sweat more relative to adults during physical activity. They spend more time in close contact with their clothes.

PFAS (per- and polyfluoroalkyl substances) are the "forever chemicals" used to make fabric water-resistant, stain-resistant, and wrinkle-free. They don't break down in the body or the environment. They accumulate in blood, liver, and breast milk. They're linked to cancer, thyroid dysfunction, and immune disruption.

The "DWR" Problem

Durable water repellent (DWR) finishes on outdoor clothing are the main source. Your child's rain jacket, ski pants, and sports gear likely have DWR treatment. When your child sweats, the barrier between the fabric and their skin breaks down, and PFAS absorption goes up.

Look for clothing labeled "PFAS-free" or "fluorine-free DWR." Wool is naturally water-resistant without PFAS. Untreated organic cotton wicks sweat without chemical finishes. Browse non-toxic home essentials for clothing options without PFAS treatment.

Also see non-toxic kitchen essentials for safer alternatives.

Source: Sweat-amplified dermal transfer and combined toxicity of PFAS substances in textiles (2025).