The pole of our large cantilever patio umbrella is made of upgrade extra-thick aluminum which makes it lighter but improves its strength and durability. Come with a base and sandbag. Please fill the base with sand for stability. Our outdoor patio umbrellas are made of heavy-duty polyester-resistant fabric, which is effective in heat insulation. The vents on the top are designed to help air circulation and stability. Compared to other umbrellas with base on the market, our bases have a pedal that controls the aluminum rod rotates 360°. Ladies also operate without stress. The crank lift mechanism makes it easy to open and close the umbrella in seconds. The angle of inclination is larger than the current patio umbrellas on the market. Put it on the balcony or in your backyard, gather with your friends in your spare time, and feel the comfortable outdoor life. We recommend you store the umbrellas at night or during extreme weather conditions.