The improved Trackster Origin, is a direct upgrade to the Trackster Classic. Made with Durable, hard wearing Thermalite fabric, a knitted fabric that is thermal and ideal at regulating body temperature as your body heats up whilst runing. Thermalite is soft to touch and smooth next to the skin. It has had the durable water repellent treatment added to the fabric to prevent this product from becoming saturated with water. Instead water beads on the outer surface of the fabric and rolls off, increasing wearer comfort. Calf reflective piping for improved visibility. Foot stirrups for the ultimate in stay put comfort. Flat bonidex waistband with shoelace and drawcord. 100% polyester. Ideal for trail running.