Rumbrella® Golf Umbrella is the best Auto-Open Golf Umbrella.A unique feature of the Rumbrella® golf umbrella is their material. These umbrellas are made using a water-resistant Teflon fabric that offers quality protection from debris, dust, and even snow and they are fully reinforced with the strongest fiberglass frames for protection and durability. All the frames are comprised of eight ribs that are stacked together in three layers. This is to ensure the umbrella’s stability during windy days.