HyperKewl Cooling Deluxe Sport Vest - Enhance your performance in the Heat! - -BLACK-MED HyperKewl Cooling Deluxe Sport Vest - Enhance your performance in the Heat! - -BLACK-MED High Mandarin collar for additional cooling relief and sun protection with handy front pockets an zipper closure; Can provide 5-10 hours of cooling relief per soaking Lightweight, easy to activate, and durable Comfortable, quilted nylon outer with HyperKewl Cooling Fabric inner, water-repellant nylon liner, and black cotton-poly elastic trim