71% Cotton, 25% Polyester, 3% Nylon, 1% Lycra Spandex & Black = 71% Cotton, 27% Nylon, 1% Lycra Spandex, 1% Olefin. Stability Fit Arch Support & Hold. Lightning Dry moisture management technology quickly moves sweat so your feet stay cool and dry. Reinforced heel and toe for extra durability and protection. Stability Fit Arch Support & Hold. Soft Ring spun Cotton Comfort. Lightning Dry Moisture Management. Reinforced Heel & Toe and Half Cushion. Stay-Put Fit.