Large panel zip access to main compartment with dual front compression straps - 40L total volumeMeets carry-on size restrictions for most airlines (22h x 14w x 9d in at 3.48 lbs.)Lockable zipper access to main compartment and quick access zippered pocket to padded laptop & tablet sleeve (fits up to most 16" laptops)The harness and hipbelt stow away for safekeeping while checked and deploy quickly for any path or trailTwo front mesh bottle pockets (fits most water bottles) and an external zip toiletry pocket.