Cantilever umbrellas are sun shade, but typically the better quality ones are made from water-resistant fabric. They can withstand a light rain for a period of time. Sunbrella is the standout fabric for water resistance and durability. Many very high end offset umbrellas use this material so if water resistance is a priority for you look for the Sunbrella logo. We recommended to close the umbrella during heavy rain or storms to prevent potential damage.