Bring the heat to your cold weather workout. On the Therma-FIT Pullover, supersoft fleece keeps the comfort levels high while you take your exercise routine to the next level. A relaxed feel means you can stretch and bench without anything to hold you back. Nike Therma-FIT technology helps manage your body's natural heat to help keep you warm in cold-weather conditions.Nike Therma-FIT men's sweatshirt.