The ARYA P5 Backpack is the most comfortable method for carrying your ARYA P5 portable oxygen concentrator. You can use the backpack all day everyday, while you do household chores, or when you get out of the house to run errands or exercise. The backpack is designed to give you a more efficient way to enjoy hands-free operation, allowing you to use both of your arms with ease. Instead of draping your ARYA P5 over one shoulder, the backpack allows you perfect equilibrium and balance while you're carrying your device.