SEOULSTORY7 4Pack Men's Winter Thermal Cushion Fleece Lined Crew Socks Drycool,Cotton,Polyester,Polyurethane Fleece lined thermal socks, Looped terry cushion on the bottom, Drycool(a kind of coolmax) yarn for moisture management Medium size fits Men shoe 7-9US Using an intense brushing process produces a soft brushed inner fabric that maximizes the amount of warm air held inside the socks for all-day warmth and comfort Made in Korea