For people who need a compact umbrella, but want the protection from severe wind stresses, this is the umbrella for you. * Product Material: Nylon * Product Weight: 1.14 lbs. * 46" Arc * One touch auto open and close mechanism * Wind test up to 33 miles per hour * Certified at the University of Washington Aeronautical Laboratory in Seattle, Washington * The WindPro umbrellas are for walkers who often face windy conditions. WindPro shafts and ribs are made from heavy-duty materials to ensure they will defy wind stresses