Under Armour 3" Performance Wristband The Under Armour Performance 3" Wristband is a traditional three-inch wristband constructed in multi-channel performance fibers. It will transport moisture away from your body to keep you cool, dry and performing your best. Embroidered logo adds graphic detail. 80% polyester/10% nylon/10% rubber. Sold in pairs. Imported. One size fits most.