Darn Tough Sock's actical Boot Heavyweight Full Cushion Socks are designed for extreme cold climates or rugged terrain. This is Darn Tough's warmest sock, featuring full terry loop cushioning throughout for maximum warmth. Elastic support at arch. Reinforced heel and toe for increased durability. FeaturesTactical boot socks average 11 in. from heel to cuff - expect them to rise just to the top of a basic 8 in. military combat boot.A performance fit means no slipping, no bunching, no blisters - so you can focus on your mission and not your feet.Berry Amendment compliant tactical socks are knit with Merino Wool that's raised, sourced, and produced in the USA.US Air Force Safe to Fly certified, meeting Flame Resistant and No Melt No Drip requirements for wearing next to skin under approved flame resistant combat and utility uniforms.A military-grade fiber, Merino Wool protects foot health and is ultra-durable in the toughest conditions.Heavyweight socks hold heat and are breathable and...