Ski heated socks with many of reinforcements (shin, ankle, heel) for maximum skiing comfort. These socks were developed using X-Technology. The package does not include batteries. These can be found in the Accessories section. These socks are compatible with Therm-ic S-Pack batteries. Ski socks are anatomically shaped for maximum skiing comfort. They contain high-quality materials that are pleasant to touch. Socks are compatible with batteries Therm-ic S-Pack which are attached to the top of the socks in the calf area (not included in the package). CARE INSTRUCTIONS Remove the battery from the sock before machine washing Turn the sock inside out before washing Do not use bleach Do not use fabric softener Can be washed at temperatures up to 30 C Package includes: 1x pair Therm-ic heated socks package does not includes batteries