All those layers making you feel a little, well, wrapped too tight? Gore's Airvantage vest provides the warmth without any of the mummification. The vest takes advantage of the inherent insulating abilities of air (the secret behind double-pane windows). When you're getting chilly, just blow into the chest-pocket tube. This fills a labyrinth of inner cavities, raising the vest's insulating ability from spring day to autumn night. Airvantage will be available in Burton, Marmot, Oakley, and other outerwear this fall.