Ultra Warm Performance S.E.T. + S-Pack 1400B battery pack | 2026

Nothing ruins a good ski day faster than frozen toes, which is why Therm-ic offers this toasty, hi-tech combo. Designed for everybody from extreme athletes to casual resort skiers, these battery-powered socks pair to your phone (Therm-ic app) via Bluetooth, for easy and independent temperature control for each foot. Even better is that the S.E.T. (Smart Elastic Technology) heating element that runs through the sock is only two millimeters thick, making it far more comfortable than many of the other options on the market. A full charge will last up to 14 hours and the batteries are easily removed so you can drop the socks right in the washing machine.