Boot Fox Men and women of our armed forces have been wearing Fox River Blister Guard socks for years. These socks have proven their worth in conditions ranging from blazing desert heat to blustery mountain ranges. Blister Guard technology significantly reduces blisters hot spots and abrasions while keeping feet dry and comfortable no matter what the conditions.Medium weight mid calfScentryTM uses a silver embedded polyester to provide antimicrobial protection to help eliminate odor Micro acrylic wicks moisture away from skin Lycra 3DTM knit throughout for a memory fit Cushioned shin for extra padding against boot lacing Mesh instep panels channel moisture away and promote air flow Lycra arch panel promotes circulation and holds sock in place Reinforced heel and toe for extended wear Lin Toe "no feel" seams mean no irritation at toes Contents: 48% micro acrylic 29% silver based antimicrobial micro polyester 21% nylon 2% Lycra spandex