Craft Sportswear Men's Active Running Arch Wide Cuff Athletic Socks: riding/cooling/accessories/wicking/dry/fit/protection/feet/footwear 80% polyester, 17% PTFE, 3% lycra; Machine wash and dry, no bleach Channel stitched ultra thin uppers allow warm air to circulate and cool down your feet Body mapped mesh structure in zones you need an extra ventilation Wide Lycra cuffs grip the ankles without pressuring them and keep the socks form fitting Sweden