With a trapped rescuer in need of air the R.A.T. Bag will help provide an emergency air cylinder to the trapped rescuer. 888RD R.A.T is constructed of 22 oz. vinyl coated nylon and virtually indestructible Tuff Bottom, and can be dragged or carried to the trapped rescuer. A carabineer is available for attachment. The air cylinder is held in place with 3 quick-release web straps and can accommodate all sizes of cylinders.