. . Part of our proprietary 5.11 Shock Mitigation System®, the Level I 9” Sock incorporates multiple zones of compression that work in tandem with 5.11. . Tactical Footwear, enhancing kinetic absorption and rebound to improve your stamina, speed, and momentum control. Moisture wicking fibers keep your feet. . dry and comfortable in any climate, enhanced elasticity ensures a stable and secure fit, extra padding at the sole provides a layer of comfort, and a. . reinforced heel and toe maximize protection and durability.. . Lightweight performance, breathable comfort. . Part of the 5.11 Shock Mitigation System. . Moisture wicking action. . Enhanced padding at the sole. . Designed to complement 5.11 Tactical Footwear. . High performance multi-polymer fabric. . Enhanced elasticity for a secure fit. . Reinforced heel and toe. . Engineered compression zones. .