Injinji Original Weight OTC Toesock Fiber Content: 78 Coolmax, 18 Nylon and 4 Lycra Prevents blisters, manages moisture, arch support Ideal for military personnel, running, obstacle racing Injinji Boot Sock provides the ultimate protection against blisters, wicks moisture and improves balance in all climates or terrains. Proven to deliver greater comfort and better blister protection, our Injinji Boot Sock separates each toe with a thin, breathable and moisture wicking fiber design. You can feel the benefits of a natural fit without any bulk in your shoe. With a dual welt band in place to prevent slippage and increased arch support, you'll find this sock to be an essential for everyday fitness, run or casual use. Field tested by Military personnel and ideal for SWAT, K9 and other public safety professionals. 78% Coolmax, 18% Nylon and 4% Lycra