Nitrous Bottle BlanketNOS new black bottle blanket gives you a great way to insulate your bottle to helps maintain pressure by keeping heat in the bottle when it's cold, or heat out when it's hot outside. This blanket is made of a rugged, easily cleaned Nylon outer shell with insulation. It's also an excellent dress up accessory and perfect for covering battle scarred bottles. Made From A Great Looking Black Nylon Outer Shell Helps Maintain Constant Bottle Pressure