A top mount dual purpose bag which may be used as a trauma bag or an oxygen setup. The main compartment measures 101/2"L x 71/2"W x 8"H with a padded end pocket measuring 71/2"W x 6"H x 3"L along with two side pockets and a pocket for two water bottles. A HDSR polypropylene divider provides protection and adds body to the main compartment. When used for oxygen, the polypropylene shell stabilizes the oxygen "C" cylinder. The valve and regulator extends into the highly padded end pocket. The Bikers Trauma/O2 pack attaches to the rack with Velcro® straps and side release buckles. Made of 1000 denier Cordura® nylon, the bottom of the bag is nylon reinforced vinyl for easy cleaning, and has self repairing #10 YKK nylon zipper with a storm flap. White 3M™ Scotchlite™ Reflective Material and a star of life. Wt. 40 oz.