The Rock Canyon External Pack Frame from Allen is a lightweight yet heavy-duty sturdy aluminum frame that allows you to pack out your gear or harvest with ease. The frame is adjustable from 33 to 36 for increased load capacity the bottom folding shelf gives you extra support when needed but folds flat for easy storage and the exterior lashing points quickly secure heavy loads. - The contoured frame rests naturally on your back and the dense foam padded waist belt and shoulder straps with cool mesh backing plus the chest strap help keep you comfortable. The pack also features a mesh back support panel for added stability.