The Osprey Aura AG 65 features the innovative AntiGravity Suspension system with load lifters that keep weight suspended off your back - making it feel like you're not even wearing a pack. Instead of a standard back panel, seamless suspended mesh extends from the shoulder blades to the lumbar. Not only does the mesh disperse and balance the load exceptionally well, but it also keeps air moving across your back, making this one cool pack.