1.Main material in 600D Polyester 2.One main compartment with divider sleeves 3.Exterior multi-organizers pockets under flap 4.Two sides zip pockets for cellphone, unbrella or other small items 5.Flap compression strap for safety closure option 6.Quick adjustable and movable padded shoulder straps with cellphone pocket 7.Extra heavy-duty stitches throughout 8.Bottom enforcement 9.Interior slips through the toggle at the top of the water reservoir sleeve to keep the reservoir hanging high and tight