US Patent 8162194 Backpack with side bolsters

A backpack includes a stabilizing and ventilating side bolster assembly coupled to a frame. The side bolster assembly includes breathable side bolsters received in breathable sleeves that cooperate with the frame to stabilize the backpack under load while providing improved ventilation between the backpack and a back side of a wearer of the backpack. The side bolsters may be customized for a particular environment, for a particular body type, or for particular loads to be carried in the backpack by changing the stiffness, density, material, dimensions or other aspects of the side bolsters.