The o2totes Inogen one G5 backpack is a brilliant solution for hands-free living, allowing you to carry your Inogen (Inogen is not included) everywhere you go while keeping your hands free. The backpack has plenty of space for your Inogen G5 as well as extra cords, an extra battery or two, a cannula, accessories, a wallet, keys, a cell phone, etc. The backpack is also small and lightweight weighing under 13 ounces. Built-in Mesh Panels and Extra Padding The Inogen One G5 backpack is integrated with mesh panels on the sides and bottom of the exterior pocket of the backpack making sure your backpack is vented and free to operate properly while in use. The backpack is integrated with a charging port and cannula port for easily charging your unit while in the backpack, never having to take the backpack out. The backpack is a perfect fit for the G5 unit, secured in its mesh pocket located at the front of the backpack. The back of the backpack holds all of your essentials. Extra padded backpack straps Our newest design in backpack straps are comfortable and adjustable, triple padded, ergonomic and designed to keep you comfortable. All backpacks come with an adjustable and removable chest strap as well as a lower belt strap for keeping your backpack in place while on the move.