US Patent 10058163 Adjustable backpack

A bag, such as a backpack, includes a back panel having an edge portion, a spacing panel having a fixed edge attached to the back panel and a free edge, an adjustment device, and a lace connecting the adjustment device and the spacing panel. The adjustment device can be configured to retract the lace, thereby translating the spacing panel toward the edge portion of the back panel, thereby increasing a space between the spacing panel and the back panel. The space between the spacing panel and the back panel can be smaller in a first configuration than in a second configuration and the back panel of the bag can be curved in the second configuration.