Quite possibly the most comfortable sock you'll ever wear, the Summer 9" Sock is designed to accompany all of the boots of the 5.11 Tactical Series family. Constructed with multiple zones of compression and fabric blends for increased blood circulation, heat reduction and moister wicking, this sock is an integral part of 5.11 footwear Shock Mitigation System. In combination with any 5.11 boot, the Summer 9" Sock rounds out a system to protect your feet, keep them dry and comfortable while allowing you to move quickly and easily in any situation. This Summer 9" Sock is specifically designed for summer wear. It is thinner and cooler than any of our sock line. Durable, comfortable and functional. Superior fit. Multiple zones of compression for comfort and support. Moisture-wicking Coolmax fibers to keep feet dry and comfortable. eCop! Thanks you for your business. MFG MPN: 5-592240191 Size UPC: 844802135030 MPN: 59224