Cold feet can be a thing of the past with these technical heated socks from XTM. Tested and used by the whole Australian Olympic team at the 2022 Beijing games, they are the perfect addition to the kit if you are skiing in extra chilly places or if you tend to run cold. 35% Merino, 25% Acrylic, 20% Polyester, 15% Nylon, 3% Spandex, 2% Latex. Features Merino blend for breathability, fit and temperature regulation Embedded heating system is comfortable and durable Strategic heating panel is placed over the toes for optimal extremity warming Wireless keychain remote for easy temperature adjustment Press stud pocket for battery at cuff Ergonomically curved, ultra-slim batteries fit snugly into pocket 2 x 3.7v Li-poly rechargeable power packs + dual micro-USB charging cable Heats up to 62ºC / 145ºF Lasts up to 7 hours 3 heat level settings machine washable Unisex sizing XTM Heat Seeker Heated Ski Socks