Patented features make this the perfect travel piece. Fits most commercial airline overheads. Constructed of a water-resistant Honeycomb Hex rips-top body fabric. Filled with numerous unique features that include a HIDEAWAY HELMET SLING that clips to the front of the bag. HIDEAWAY BACK STRAPS are fully padded and include a sternum strap. Its a BACKPACK: carry in a north/south direction with its hide-away backpack straps. Its a CARRY-ALL: carry horizontally with detachable shoulder strap (included). There is DELUXE CONTOURED BACK PADDING with Airflow to minimize perspiration. There are Top & Side Ergonomic Grip Carry Handles for versatile carrying options. The Over-Under Section is Great for organizing boots or protecting equipment with fold-up adjustable/collapsible dividers & protectors. There is an Interior zip-around trap door allows the bag to become adaptable for larger items. The Bottom section has Air Vents for ventilation of ski boots and shoes. Also has a Side Organizer pockets for lift tickets, boarding passes, keys, etc. The top section features a full three-sided access opening, mesh with wall pockets, port for cords/cable.