DEI Cool-Tobe Extrteme is able to reflect continuous heat up to 750°F while offering a quality profession look, Cool Tube Extreme is flexible enough to conform to tight bends and provide superior protection against extreme under hood temperatures, weather conditions and abrasions. Made from a special composite material with a spiral wire reinforced, Cool Tube Extreme is ultra-light that can be slit lengthwise to apply to cables, wires and hoses.