Designed for the slopes, built for performance. The Pro Heated Compression Socks feature a snug, over-the-calf fit with targeted compression zones, arch support, and reinforced toe and heel for all-day comfort in ski and snowboard boots. Two heat zones—above and below the toes—deliver powerful warmth where it counts, and powered by a thin 3.7v contoured rechargeable battery that sits on the calf, it allows you to control temperature right from your phone or smart watch, providing up to 13 hours of heat between charges. The Ideal solution to keep the toes warm when skiing, snowboarding, or any cold-weather pursuit. Designed to fit inside a ski boot Above the calf length Adjustable heat above and under the toes Comfort toe seam construction 3.7v contoured recharbeable battery sits inside a zippered pocket on calf and won't interfer with a boot Bluetooth wireless - control temperature from phone or smart watch 4 adjustable temperature settings Up to 13 hours of heat between charges (4-high, 5-med/high, 9-med/low, 13-low) Includes a pair of 3.7v rechargeable batteries with USB-C charging cable