Buy a pair of these and we bet you'll come back for 3 more. 5.11 Tactical's one-of-a-kind socks provide unmatched comfort and performance because they’re engineered with twelve zones of compression and fabric blends. As an integral part of 5.11's Shock Mitigation System™, these socks feature Coolmax® for moisture-wicking and spandex for lasting support. These Level I socks are approximately 20% thinner than Level II socks.