Outdoor Research Radiant Hybrid Pullover Shirt 2012: As versatile as any of your other outdoor gear, the Outdoor Research Radiant Hybrid Pullover™ offers the best cold weather protection. With soft, next-to-skin comfort, the fabric pulls moisture away from your skin during a long trek to high camp. Just push up the arms and unzip the neck-to-chest zipper for greater ventilation and to be cooled off by the mountain breeze.