Thermo-Tec`s new Express Sleeves use a combination of high-temperature insulation material and a highly reflective Mylar foil with a Velcro closure. The sleeves are designed to provide maximum protection for wires, hoses, and cables from the very damaging effect of radiant heat with an easy application. Simply pull apart the material, wrap it around the wire, and re-close the sleeves. Express Sleeves reflect over 90 percent of radiant heat and are fireproof and fire-resistant.