Two inside pockets are designed to keep the outside fof the bag smooth preventing the bag from catching on obstacles. This bag also features a quick opent top, rigid TUFF bottom and two straps for securing tools or an air cylinder. Constructed of heavy 22 oz. vinyl with 3M™ Scotchlite™ Reflective Material. Measures: 12”H x 13”W x 29”L with 4,500 cu. in. of space.