K2 have brought lightweight performance to women's boots, and now they're bringing the heat. The K2 Anthem 105 MV Ski Boots are proof that heated liners no longer are the sole province of sloppy beginner-level boots, which in turn is proof that people who ski well and often actually prefer to have warm feet. Mind = Blown. This is the same awesome 105 flex boot as the regular Anthem 105 MV, but with a Therm-ic® heated liner with batteries built in and Bluetooth® smartphone controls.