Description The ultimate combination: Merino wool for cold weather insulation and the performance that comes from a perfect fit. There is no other heavyweight sock that can make this claim. If there were, we would have made it! This sock is loaded with 100% Merino wool on the inside against your foot, so all you feel is comfortable and dry. ?Features Heavyweight full-foot cushioning for warmth and protection. Durable nylon exterior for extended wear. Mid-calf height works well with hunting boots. Merino Wool 82%Nylon 13%Polyester 3%LycraA(R) Spandex 2%