Sievi Alaska Thermo XL+ Safety Boot – Heated Bluetooth Winter Work BootThe Sievi Alaska Thermo XL+ Safety Boot is the ultimate winter safety boot, built to keep your feet warm, dry, and protected in the harshest conditions. Featuring the Therm ic Bluetooth heat kit, you can enjoy all day warmth on a single charge. Control the temperature, check battery status, and select heat settings directly from the Therm ic smartphone app. Crafted with a sheep wool lining and PrimaLoft thermal insulation, these boots ensure warmth