Keep the cold out and the warmth in with heat retainers by muk luks men's 1-pair heat retainer thermal insulated socks. Advanced thermal heat retaining technology will work to keep toes warm while stretchy knit fabric to allows for a flexible fit and easy pull-on style. # Pieces In Set: 1 Pair Shoe Size Range: 9-13 Fiber Content: 91% Acrylic, 8% Polyester, 1% Spandex Fabric Description: Knit Care: Machine Wash, Tumble Dry Country of Origin: Imported