This features one-half inch of high density, closed cell foam that helps protect the oxygen regulator. It is large enough for your cylinder and attached regulator. There is a pocket on the side for a mask, nasal cannula, etc., elastic loops inside pocket for seven oral airways, and a shoulder carrying strap that includes hook and loop straps to attach to a cot rail. Made of heavy Cordura® nylon, it has 3M^TM heat applied silver reflective trim to minimize contamination. There are models available for "C", "D", and "E" cylinders. It weighs 16 oz. the overall dimensions for the "D" cylinder model are 23 1/4"L x 4 1/4" diameter (body) 7 1/2" diameter (head).