65% Repreve Recycled Polyester/27% Polyester/5% Olefin/2% Elastane/1% Nylon. Fights odor. Repreve recycled yarns. Heel, arch and toe cushioning. Enhanced heel pocket for secure fit. Ribbed channels improve ventilation on leg. Mesh instep for breathability. Abrasion-resistant yarns in heel, arch and toe.