_ a well sized day-backpack w/ thermoformed back panel _ padded back-carrier pocket fits most 15" laptops _ padded back-pocket also fits hydration bladders up to 100 oz./3 L _ trap-door for hydration-hose w/o sharp velcro edges _ includes a unique thermoformed cap to protect optics, etc. _ multiple modular/MOLLE/velcro expansion options externally _ large organizer pocket for pens, lights, knives, etc. (in outermost pocket) _ unique harness system & removable MOLLE-compatible belt _ use the belt alone as a surface for mounting bags/pouches