Colter Due to the success of the Colter Collection, Sun Mountain added a long-sleeve pullover. In Colter, Sun Mountain utilizes patented 37.5® premium insulation which works to maintain an ideal core temperature, enabling you to perform better longer. FEATURES Deep-cut, ½ -zip pullover Strategically placed stretch panels for playability Insulated panels keep your core warm Two hand warmer pockets plus external and internal chest pockets. Keep your game sharp with this reliable, comfortable, and stylish gear — made for modern golfers who want performance with personality.