Durable and stretchy material Sweat-wicking and quick-drying Locked-In Fit design secures sock to heel Mesh panels on top of foot for breathability Built-in arch support Three pairs per pack 98% polyester, 2% elastane Machine wash The Under Armour Performance Tech Crew Socks (3-Pack) are imported. Slip your feet into socks built for athletes when you wear the Under Armour Performance Tech Crew Socks (3-Pack). These socks are stretchy, sweat-wicking and fit securely thanks to the Locked-In Fit design and built-in arch support. Under Armour Performance Tech Crew Socks (3-Pack) in Black/White