Port Authority® Wheeled Backpack. BG76STake the strain off by rolling this wheeled pack, or use the shoulder straps to carry it like a backpack. 600 denier polyester with 300 denier mini ripstop accents and reinforced bottom Large main compartment with hooded zip closure 12 inch deep top front pocket Lower front pocket with padded protection One hand push button pulley system for easy use and stowage; handle extends to 18. 5" Air mesh shoulder straps tuck away into padded back Wheel cover