Aura AG 50 Backpack Rainforest Green - MD. Flaunting the innovative Anti-Gravity Suspension system, the Aura AG Series delivers supreme comfort and ventilation. This 3D contoured suspension literally allows the wearer to move as if they don't have a pack on - true anti-gravity realized. Combined with custom-fit capability and a full-feature set, the Aura AG sets a new standard in ventilated backpacking.