Inogen one G5 Backpack, slim & lightweight design with storage & comfortable, adjustable backpack straps/For the Backpack Only, no oxygen included Will Only fit the Inogen One G5, model # 1O-500 One of our favorite designs for the Inogen one G5 unit, this lightweight design is everything you want when going hands free with your Inogen unit. Weighing only 10.5 ounces, this backpack has everything, zippered pockets for your credit cards, keys, inhaler. Easily accessible compartment for your unit to sit securely. Designated charging port and nasal cannula outlet. Triple padded backpack straps with adjustable and removable chest strap, easy to clean fabric & essential mesh for optimal breathability. All backpacks come with an adjustable & Removable chest strap (+) a waist strap, carry handle can be used or tucked away when not in use inside the backpack. Zippered bottom for easily changing batteries, mesh panels on both sides (+) the bottom, fits both the standard & extended battery Specifics: Fabric: Easy to clean, very breathable & lightweight Cordura canvas (black) with our high performing mesh panels Length: Side to side: 7.20 (Fits the Inogen one G5 unit perfectly) Width: 3.26 Height: 9" This is with the double battery, smaller with the single battery Side to side: 8.20 Zippered front pocket: Under flap, side to side: 5 x 5 Zippered front pocket: On flap: 4 x 5 Carry handle (attached to backpack): 13" Backpack straps: 18" shortest to 42" longest, 2.5 inch width with triple padded 3d mesh foam for optimal comfort Zippered bottom for easily changing battery