Strategic Cushioning in Under Armour Performance Over the Calf socks offers superior protection in high-impact areas of your feet for greater comfort and performance. Spandex fabric throughout the socks helps them to stay up over your calf and helps them retain shape. With little flash and a lot of function, these socks will make sure that you perform your best. Strategic Ventilation wicks moisture and accelerates evaporation. A Perfect Fit Toe eliminates bunching and abrasion. ArmourBlock™ prevents the growth of odor-causing bacteria. Built with Embedded Arch Support. A Charged Cotton footbed enhances cushion and absorbs impact.