_ derived from our best-selling Plan-B™ sling pack, this model adds a backpack harness by popular demand _ it has the same legendary storability (in lockers, vehicles, etc.) but distributes heavy loads to both shoulders _ 3-d thermo-moulded back-panel for support w/ flex _ thermoformed, semi-hard case/cap in front _ molle cutouts on the larger front velcro-patch field _ padded, movable internal divider like those in photo bags _ small top-zipper to pass long objects like antennas/barrels _ side elastic-topped-pockets for water bottles, knives, etc. _ compression-straps also cross to secure large objects _ relatively large volume will hold bulky items with ease _ generously padded back with air circulation pad array _ 3-d air-mesh under straps for ventilation & comfort _ wind-flap zippers on all pockets to keep out the elements _ large grab-handles for carrying and pulling to front/back _ full hydration bladder compatible (up to 67 oz./2 L), can fit 3 L hydration bladder up to 2.5 L capacity _ trap-door pass for hydration hose w/ large bite-valve cover _ internal mesh zip/elastic pockets for organizing items _ top/bottom compression-straps, also secure tubular items _ compression straps can cross on sides & over top