Looking for a backpack specifically designed for your Rhythm P2 POC? Ideal for anyone with a Rhythm P2, this Backpack offers structural support and breathability while on the go. Its pockets, lightweight design, mesh panels, and zippered bottom for extra storage provide convenience and comfort all day long.Backpack only, does not include a poc. Designed to provide maximum convenience when traveling or at home with oxygen therapy. It features a clear top panel for easy visibility, a cannula port so your cannula doesn't kink, the ability to charge the concentrator in the bag, and secure backpack straps and a padded carry handle for comfortable wear. Designed for comfort and convenience, one of the backpack straps features a cannula holder (no dragging of the cannula), padded backpack straps for even weight distribution, and storage for charging cords/wallet, keys & more. Additionally, a chest and waist strap provide extra stability and support. Stay comfortable and carry your oxygen concentrator around with ease. (both are adjustable and chest strap can be taken off when not needed) see dimensions below. The bottom portion of the backpack has a unique feature; the compartment can be taken off when it is not needed, but can also hold an extra battery and charging cords Specifics: Inside dimensions: 6.3 width (side to side) Depth: 3.3" Height: 8.7" Top to bottom (without bottom pocket) Front Pocket: Bottom Compartment: 6.3-width, 3.3-depth, 3" height Can come completely off and zipped back on. Chest strap: