Perimeter Suspension (Spring Steel rod outline with PE sheet core) with 40lb (18kg) load rating; Adjustable torso height and width; Dual density shoulder harness with load-lifter straps and removable sternum strap; RE-FIT fully adjustable dual density hip belt (from 26-42" on Unisex & from 24 - 40" on Women's fit); Dual large hip belt pocket with DWR treated zippers; Cinch-and-roll closure with crossing webbing straps to compress and secure the pack's contents; Removable lid flap with DWR treated zipper; Bottom flap for additional sleeping pad storage location; Bottom flap has a zippered pocket for storing rainfly; Hydration port & internal hydration sleeve