Stiff, cold shells make the first buckle of the morning the hardest one, and the Thermal Kart Heated Ski Boot Bag wraps both boots in surround heat to help soften them before the first run. The heated boot backpack has low, medium, and high settings with a maximum of 140 degrees Fahrenheit, and its insulation helps hold that warmth around the boots. A wall outlet warms the boots at home or the lodge, and a vehicle outlet holds that warmth on the drive to the hill. What Our Gearhead(R) Experts Are Saying:"Boots, goggles, socks, and light layers fit in the top-loading compartment with the helmet riding in the exterior sling, so everything stayed in one carry-on sized pack. Boots warmed at the lodge were easier to get into, though the heat only runs while the pack is plugged in, so I warm them on arrival and not in the air. Carry-on rules vary by airline, so I check the size limit before I leave."