An excellent choice for any active, outdoor enthusiast, this stick umbrella is designed to hold up to severe wind stresses without damage. * Product Material: Nylon * Product Weight: 1.21 lbs. * Features a 50" arc, aerodynamically designed infrastructure, heavy-duty steel shaft and fiberglass ribs and a mahogany curved wood handle * Wind tunnel tested up to 58 miles per hour * Certified at the University of Washington Aeronautical Laboratory in Seattle, Washington