With making of heavy duty polyester resistant fabric, our 10ft Large Heavy Duty Offset Hanging Outdoor Round Cantilever Patio Umbrella for Garden, Deck , Lawn and Porch is effective in heat insulation, UV radiation protection, water and corrosion protection. This durable material can be used in a variety of weather conditions. For stability and safe use, we recommend buy a separate base and the base must be filled with sand or stones, you can search #121592146 to get a fitted base. This umbrella has 8 sturdy ribs to provide strong support, allowing the umbrella to slide easily along the main support rod to adjust the height. It can maintain stability in the breeze and will not be blown over easily . It's the best choice for a family gathering outdoor.