Darn Tough Coolmax No Show Cushion Coolmax Polyester 33% / Acrylic 30% / Nylon 29% / Polyester 4% / Lycra 4% Made in US High density cushioning on foot bottom provides impact protection Colmax and synthetic blend to wick away moisture for drier feet Reinforced heel and toe for a very long lasting sock Elastic arch support helps provide endurance for your feet Ring toe construction for a comfortable, invisible seam