Easy-care women's ExOfficio underwear is built for adventure travel, but it's so comfortable it's just might become your everyday underwear. NWT Made with a breathable, moisture-wicking blend of 89% nylon and 11% elastaine. Machine wash and dry. Size: Medium Breathable, moisture-wicking and quick drying polyester. Highly breathable - comfort even in the hottest conditions. Antimicrobial technology offers advanced protection against odors. Soft, comfortable fabric won't chafe.