Drymax Lite Trail Mini Crew Unisex Socks polyester 65% Drymax/Olefin, 20% Polyester. 8% Nylon, 7% Elastaine Double welt to increase leg and foot protection Drymax's dual layer system offers superior moisture management and quick drying time Unique vented arch band and and breathable mesh panels on top help keep feet dry Anti-Blister System consists of seamlessly smooth interior and flat toe seams 3D Advanced Fit with based specially developed 3D models for superior fit