The North Face CB Can Cover Black Retail Price: ¥2,640 Brand new, unused. Available for immediate purchase. From the HP: This is an insulating cover for CB cans, the common cassette gas canisters used in homes. The main material is recycled fleece fabric on the outside, which doesn't easily transfer cold. Neoprene with low thermal conductivity is used for the lining. It reduces the drop-down phenomenon, where the temperature of the can rapidly decreases due to the heat of vaporization of the gas at low temperatures. Because it has stretch, it can also be used as a bottle cover. This product is also perfect for protection against heat from direct sunlight in the summer and radiant heat from burners. I use it year-round.