KEEN Men Springwater Low Cut Tab Ultralite Sock 50% Wool/ 44% Nylon/ 3% Polyester/ 3% Spandex Made in US Bike specific impact cushioning on forefoot and pressure point cushion on ankle Left and right design for optimal fit Mesh vent on top of foot for extreme breathability Seamless toe in flex zone to avoid bunching and chafing Merino wool wicks and dries fast for blister free protection