The Athalon “Onboard” Convertible Boot Bag is built for travelers and snowsports enthusiasts who need performance, versatility, and airline-friendly dimensions. Its patented design fits easily into most commercial airline overhead compartments, making it the ideal carry-on for ski trips. Key Features: Convertible Carrying Options:Wear it as a backpack with hideaway padded shoulder straps and a sternum strap, or use the detachable shoulder strap to carry it horizontally as a duffel. Helmet Storage:Includes a hideaway helmet sling that clips to the front of the bag for easy access and storage. Ventilated Boot Section:Bottom compartment features air vents for ski boots or shoes and includes fold-up, adjustable dividers for better organization and protection. Organized Storage:Interior zip-around trap door allows expansion for larger items. Side organizer pockets hold lift tickets, boarding passes, keys, and more. Comfort-Focused Design:Deluxe contoured back padding with airflow channels reduces perspiration. Ergonomic top and side carry handles offer flexible carry options. Spacious Upper Compartment:Full three-sided zippered opening with mesh wall pockets and a built-in cord/cable port. Specifications: Size: Medium – Meets most major airline carry-on requirements Exterior Dimensions: 20" x 13.5" x 10.5" Linear Inches: 44" Weight: 5 lbs Capacity: 2,835 cu. in. Material: Water-resistant Honeycomb Hex ripstop polyester Warranty: 5 years