The aftermarket carry bag for the Inogen one G3 or Oxygo unit is perfect for anyone who wants to carry their unit & their personal items in one bag in a beautiful, well designed purse/bag. Because the straps go from long to short, it can be worn as either cross body or shoulder bag (3) pockets for keys, wallet, cell phone & more. ZIppered bottom for easily taking out battery, fits both standard & double batteries. Battery will fit in the side pocket, clear top for easy viewing of your G3 or oxygo unit & padded strap for keeping your bag comfortable on your shoulder. Works with both the standard and double battery.