make of durable material , this bag unzip and open wide , like a book , so the cable can be easily re-coiled inside . keep you trunk neat , so whatever else you put in there do not get tangle up with you jumper cable . Big enough for a 25 foot set of Coleman 4-gauge cable . a external pocket for other item . would also work great around the shop for compressor hose . a good value , especially with the freebie mug boss .