Proquip ULTIMATE HTX RAIN PantsUltimate HTX is ProQuips first rain jacket capable of recycling and transferring body heat for improved performance in cold weather. HTX (Heat Technology Extreme) works using a metallic base liner, sewn inside the jacket, to capture body heat and reflect it onto the golfers body, warming the trunk, lower and mid back for improved flexibility and mobility during the swing. Four way stretch for freedom of movement Crease resistant Waterproof zip and zip