Sturdy Pole and Ribs: Our Backyard umbrella is made of 8 steel ribs. The wind resistance is stronger, and the wind is not afraid of being overturned. Wind Vent: The extra piece of fabric at the top of the umbrella allows wind and heat venting, will be a wonderful choice for outdoor living. Umbrella base is NOT included. Multifunctional Sun Umbrella: Our sun umbrella can be used as a beach umbrella, a sunshade and an umbrella in different occasions such as garden, backyard, beach, park, shop gate, etc. Sunshade & Waterproof: Our sunshade is made of special polyester cloth, which can not only help you block out the sun and prevent your skin from being suntanned, but also has the function of waterproof, which can protect you from being wet. Crank Opens / Closes System: This market umbrella is designed with crank open system for easy and quick use. Convenient even for kids and the elderly to keep the sun away in the daytime. Our product made with premium materials for durability, and each product has been tested to ensure that it is intact.