This is a favorite top for running in cool weather, ice climbing in the cold weather, and skiing in the deep freeze; the Isis Girl's Chamois Zip-Neck Turtle features brushed polyester fabric that provides significant warmth while quickly wicking moisture and Offers a degree of wind resistance. The outer surface has a smooth face that slides easily under other layers and resists pilling. We add a bit of spandex for great freedom of movement and a snug fit that wont sag. Flat contrasting seams on the shoulder and arms, and an Isis star on the right sleeve, add Design.