Padded adjustable back straps, two large internal mesh shoe pockets, removable waterproof bag for wet items w clip for wetsuit, dual zip for full access to main compartment, large outside mesh pocket, helmet pocket w. safety clip and bungee straps, two external mesh water bottle pockets, 5" expandable mesh bottom compartment, 2 padded side pockets for CD player w. slit for heaphone wire, reflective binding on padded straps, side pockets and front face of bag. 600 denier Poly/PVC. 13"W X 19"H X 12"D.