Under Armour Performance Crew Socks - Youth If your socks aren't working for you, you're wearing the wrong pair. The Under Armour Performance Socks are made with UA's Signature Moisture Transport technology to accelerate evaporation and keep your skin dry. A seamless toe and comfort top deliver a secure, comfortable fit with no irritation. Underneath the foot, a Charged Cotton footbed features Traction Control so your foot doesn't slip within your shoes. An embedded arch support cushions the foot so you feel less fatigue during long workouts. ArmourBlock® prevents bacteria and odor growth. 83% polyester/4% nylon/2% spandex. Imported.