Take on the winter chill in a jacket designed to add some warmth to your life. Loose enough to layer. this puffer has a synthetic fill that adds insulation and a water-repellent finish to help keep you dry. On top of that. Nike Therma-FIT technology helps manage your body's natural heat to help keep you warm in cold-weather conditions. So zip it all the way up. throw your hands in the pockets. pop the hood over your ears and you're good to go!