The Nike Elite Anti-Blister OTC Running Sock provides snug and secure full-calf support. Lightweight, anti-friction fabric helps to reduce blisters on tough runs. Dri-FITŪ technology and ventilated mesh provide breathable, moisture-wicking performance to keep you cool, dry and comfortable every time out. Left and right specific design for an anatomically better fit. 92% nylon/8% spandex. Imported.