The A.T. Coolmax Liner is designed to be worn underneath a heavier sock as a protection against abrasion and for moisture transport. Coolmax and nylon (wicks moisture away, keeps feet dry and comfortable) Double cuff that stays in place without biting Reinforced heel and toe Flat toe seams. Content: 79% CoolMax, 17% Nylon, 4% Lycra 2 Pair Pack |