Sky Large Umbrella, 27 Inches 3 Fold Check Border Polyester Fabric. The manual open function in our umbrella allows for easy one-handed operation. Sky Umbrella is fortified with 10 resin-reinforced fiberglass ribs to withstand powerful wind and rain without turning inside out. The slip-proof, and grip handle with a wrist strap allows for carrying it easily. It comes with a handy protective cover for easy storage.