Outdoor Patio Umbrella Cover Transparent Waterproof Bag for 13 Foot Umbrella This patio umbrella cover bag is waterproof and transparent. The cover will fit most 13 foot outdoor umbrellas. The Transparent material is made with a high-quality PVC material. Cover protects your umbrella from rain, snow, dust, tree sap, bird dropping, and other elements. Bag is easy to use with its zipper and drawstring to keep your umbrella clean and dry.