Mtp-5s multi-terrain backpack expands to hold all your gear with side compression straps when bag is not expanded universal webbing to attach pouches and accessories internal zippered mesh storage pockets and internal office/organizer system hydration compatible with ided zippered section for up to 3L bladder with right or left side routing system (not included) padded shoulder straps with adjustable/removable elasticized sternum strap waist strap is adjustable/removable backside is padded for comfort with large top opening zippered compartment reinforced drag/carry handle on top and sides full zip main compartment 2-way zippers with pulls on all compartments universal webbing on bottom with straps for bedroll/sleeping bag (straps not included) metal drain grommet 20" x 16" x 12".