12-RIB Construction. Most small or mini compact umbrellas are made of 6 or 8 or 9 ribs, but travel umbrella is fortified with 12 resin-reinforced fiberglass ribs that flex slightly to withstand powerful gusts without turning inside out. The travel umbrella is almost unbreakable with a three-fold chrome plated metal shaft, and strong metal frame to allow for greater stability in high winds. Perfect for men, women, teens and kids. Auto open/close function is easy to use. Collapsible umbrella is easy to store in purses, briefcases, backpacks, luggage and more. The Travel Umbrella is Windproof, waterproof. The fabric which is made of 210T pongee is smoother, thicker and sturdier.