An extra layer of lightweight warmth can save the day when the weather turns on you. The EI Cap is indispensable as a base or mid layer in cold conditions, and also makes an excellent outerwear piece. Made from 6-oz. double-faced Capilene' polyester fleece (with a touch of spandex for stretch) that's nonbulky, soft, moisture-wicking. Imported. M's El Cap 1/4-Zip