79% Repreve recycled polyester/17% polyester/3% elastane/1% nylon - Built with Force technology to wick sweat and dry fast - FastDry wicks away sweat - Stain Breaker technology releases stains - Fights odor - Repreve recycled yarns - Heel arch and toe cushioning - Arch support - Ribbed channels improve ventilation on leg - Mesh instep for breathability - Raised rib pattern on arch for enhanced moisture management - Abrasion-resistant yarns in toe - Stretch top stays put and reduces tension - Can also be worn as a liner