Winterheat 3400 Ski Boot Heaters / Gold Black low-profile design with a durable

low-profile design with a durable hardshell exterior

45mm Power Strap

Because no two faces are the same

Developed with a high-volume anatomically shaped shell and liner

The redesigned the Tri Force technology to perfectly integrate with the BOA®Fit System

Winterheat 3400 Ski Boot Heaters / Gold Black low-profile design with a durableThe Winterheat 3400 Bluetooth Batteries are the best boot heaters on the market. With hours of powerful heat, these heaters will keep your feet warm so you can focus on enjoying your day outside! Winterheat batteries are compatible with Surefoot Custom Liners, no installation required. Features With the Winterheat 3400 Bluetooth battery, you can control the strength of your heat remotely using your smartphone. Up to 17 hours of heat Comes with a