INSULATING COVERAGE. The Nike Therma Men's Training Pants are made with insulating fibers that wicks sweat to help keep you warm and dry when you're training hard. This product is made with at least 50% recycled polyester fibers. Product Details * 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