Technich HyperKewl Colling Ultra Sport Vest-Perfect way to stay COOL during ANY outdoor activity Pull over with mesh ventilation and scoop neck. Ideal for motocross riders, runners, equestrians and cyclists. Can provide 5-10 hours of cooling relief per soaking. Lightweight, easy to activate, and durable. Comfortable quilted nylon outer with HyperKewl fabric inner, water repellent nylon liner, and black poly-cotton trim.