2 3/4 strap drop; 32 adjustable straps; zip closure; wheels and a telescoping handle so that the bag can be used as a rolling bag; lightweight, water-repellent polyester; two large compartments and a smaller accessories compartment. Lightweight water-repellent polyester. Two large compartments and a smaller accessories compartment. Approximate 12" w x 17" h x 7" d. Two exterior pockets perfect for water bottles. Shoulder straps tuck away when backpack is used as a wheeled bag.