Warmbac Bottle Bag
A very tough bag, built to fit a pair of 7l diving cylinders, and carry them in something like comfort while coping with the wear and tear.
Double fabric on base, also in outside back to withstand dragging while laden. Heavy duty carry handles on each side and well padded shoulder straps minimise pain as far as possible! and cylinder taps are protected by an internal neoprene flaps.
The Bottle Bag is slightly taller and narrower than most extra-large bags, which makes caving while keeping it on the back marginally easier.