Old man winter stops for no one, not even you and your marathon training regimen. And as much as you'd like to think that your cumulative and required 51 miles per week is incredibly important, old man winter does not agree with you and will continue laying down a path of snowy, icy destruction. The least you can do is fight back with adequate layering, the Nike Men's Aeroloft 800 Vest, and a fun type two approach to enduring your interval training turned penguin slide down Main Street. Crafted with a streamlined, sleek Dri FIT exterior and cozy warm 800 fill goose down, this vest is built specifically for maintaining core warmth throughout the course of your cold weather fitness adventures, without weighing you down or restricting movement. The water repellent finish assures a little extra safeguard against wayward weather should the skies unleash some unexpected flurries. However, the strategic laser perforations between the baffling permits excess body heat to escape and ultimately encourages optimal body temperature regulation while the rear zippered pocket and attached hand strap allows you to easily stow and carry the vest should you begin to overheat.