Thermal Kart The Thermal Kart is a 40L heated, insulated travel backpack designed to keep ski and snowboard boots warm and organized. It includes a heated boot compartment with Low, Medium, and High settings reaching up to 140°F, dual power options (AC wall and DC auto), carry-on-friendly dimensions, a retractable helmet sling, and dedicated storage for apparel and accessories, making it ready for travel and the slopes.