All those layers of clothing making you feel you’re wrapped too tight? Gore’s Airvantage vest provides the warmth without the discomfort. The vest takes advantage of the "insulating abilities of air. When you’re getting chilly, just blow into the chest-pocket tube. The air fills inner cavities in the vest, raising its insulating ability from spring day to autumn night. Airvantage will be available in outerwear stores this fall.