Carry-on sized heated ski boot backpack for travel-ready skiers who pack efficiently. Heating technology warms both boots to help soften ski boot shells for easier entry and a more comfortable fit. Compact, organized and built to keep your boots warm from home to the mountain. Carry-on sized 40L capacity for travel Surround heating warms both boots Fast heating or up to overnight warming Helps soften ski boot shells for easier entr Top-loading boot compartment for easy access Retractable helmet sling packs your helmet on the exterior for maximum ventilation AC/DC power for home warming and vehicle travel Ideal for air travel, long-haul trips and minimalist packing Lightweight for efficient carry-on flights Backpack grade support plus padded and contoured adjustable shoulder straps with a padded spacer mesh back panel, ventilation channel and sternum strap Specifications Product Type: Carry-on heated ski boot backpack Capacity: 40L Heating System: Advanced Warming Boot System(TM) - heated, insulated and technically designed backpack for thermal conduction warming 3 Heat Settings: Low, Medium & High Maximum Temperature: 140AdegF / 60AdegC Power: 120V AC / 12V DC Best For: Air travel, train travel, long-haul trips and minimalist packing Gear Capacity: Boots, helmet, goggles, gloves, socks and light layers Fits Max Ski Boot Size: Mondo 29.5