Nike Therma-FIT technology helps manage your body’s natural heat to help keep you warm in cold-weather conditions. Water-repellent finish helps keep you dry in wet weather. Synthetic fill helps keep you insulated and warm. Elastic at the cuffs and hood help seal in warmth. When the temps start to dip, it's time to break out the puffer. This one is made with a woven, water-repellent outer shell and filled with synthetic insulation for cozy warmth. Slip it on and stay toasty.