IT DOESN'T GET ANY WARMER THAN THIS. The Nike Sportswear Therma-FIT Jacket is insulated from top to bottom with puffy, pillowy warmth. The water-repellent design has down-fill around your core and synthetic-fill insulation on the arms that helps keep every bit of heat inside (and water out). Plus, the pockets are extra awesome: put stuff in from the from the top OR tuck in your hands from the sides to keep them warm.