REI Forester backpack, large, internal frame. Soft, thermo-formed foam back panel with cushion inserts and molded air channels offers breathable comfort on the trail. HDPE framesheet combines with a single aluminum center stay to provide an optimal blend of stiffness and torsional flex. Foam-padded, contoured shoulder straps with Auto-Cant(TM) fit a wide range of shoulders and adjust automatically to varying trail conditions. Used only once (to hike into the Grand Canyon), then stored in closet ever since. Excellent condition. $50 cash obo.