The Nike Therma Men's Long-Sleeve Quarter-Zip Training Top gives you a warm, insulating layer for training. It wicks sweat to help keep you dry and comfortable while you work out. This product is made with at least 50% recycled polyester fibers. Nike Therma fabric helps manage your body’s natural heat to keep you warm-and performance high when temperatures are low. Dri-FIT technology moves sweat from your skin for quicker evaporation-helping you stay dry and comfortable. 100% polyester.