HyperKewlTM Deluxe Sport Evaporative Cooling Vests -Leatherbull(Free U.S. Shipping) High mandarin collar for additional cooling relief and sun protection, handy front pockets, and zipper closure Provide 5-10 hours of cooling relief per soaking lightweight, durable, and washable Comfortable, quilted nylon outer with HyperKewlTM polymer embedded fabric inner, water-repellant nylon liner, and black cotton-poly elastic trim designed especially for bikers