This is an Official Wounded Warrior Project® Licensed product. Between August 2012 and December 2015, Under Armour will make a donation of over $2 million to WWP, benefiting injured service members & their families. Soft anti-pick, anti-pill fabric maximizes comfort & has a cleaner, snag-free finish. 4-way stretch fabrication allows greater mobility in any direction. Moisture Transport System wicks sweat away from the body. Anti-odor technology prevents the growth of odor causing microbes. 30+ UPF protects your skin from the sun’s harmful rays. Rib-knit collar provides durable stretch & a clean, classic look. Body: 5.6 oz. Polyester/Elastane. Collar: Polyester. Imported.