Designed for maximum comfort and support, the Slip Stream OTC socks from 5.11 are the perfect choice to complement all 5.11 footwear. We combined moisture managing polyester and a breathable upper weave to keep your feet cool, dry and comfortable, while a supportive compression arch band adds support and decreases foot fatigue. To increase longevity, we reinforced the heel and toe with durable rubber and used NanoGLIDE fiber throughout to reduce friction and chafing. The Slip Stream OTC sock: made to keep you mission ready. Material: Polyester.