Falke Men's Cool Kick Invisible Sock 77% Polyester, 22% Polyamide, 1% Elastane Imported Pull On closure Machine Wash Sneaker sock with ultra-plush sole that is invisible inside shoes Anti-slip silicone backing in heel Patented, anatomical fit so each sock is created specifically for the left and right foot Moisture-wicking properties to keep foot dry Lay flat to dry