Prince Men's Performance Plus Quarter Socks 49% Coolmax Polyester, 26% Polyester, 23% Nylon, 2% Spandex Imported Machine Wash Coolmax moisture management fibers transport moisture away from the skin to keep feet cool and dry Arch compression for support and stability to reduce foot fatigue - hugs your foot and keeps sock in place Targeted zone cushioning on the ball and heel of the foot - provides extra protection in high impact areas Blister resist fibers and smooth toe seams to reduce friction Zone mesh for breathability and comfort