evo.com | Therm-ic Ski Socks > Say goodbye to cold feet! With extremely low-profile, hidden heat elements woven discreetly into the soles and compact battery packs that fastens seamlessly to the top of the socks' cuffs, the Therm-ic Sock Set Heat Fusion Uni + S-Pack 1400B Socks offer customizable warmth for up to 16 hours. Controllable via Bluetooth(R) technology and the Therm-ic Heat Control app, these heated socks will revolutionize your ski days. Bluetooth(R) Heat Control With Therm-ic's new Bluetooth(R) function and the Therm-ic Heat Control mobile app, you can check and adjust the heat setting for your socks, insoles and gloves in real time using your smartphone. Includes USB Charging Cable (Wall Charger Not Supplied) Easy Attachment of Batteries to the Sock Cushioned Reinforcement Under the Foot S-Pack 1400B Battery Designed to keep your feet warm for up to 16 hours. Fitted with Bluetooth(R) technology, you can remotely control the heat settings via your smartphone using the Therm-ic Heat Control app. | Therm-ic Sock Set Heat Fusion Uni + S-Pack 1400B Socks 2025 - Small in Black