There's no better way to sit back and enjoy the sun than with this umbrella outdoor patio from us. 100% high quality polyester canopy is waterproof, fade resistant and easy to clean. The 1.49'' diameter steel pole and 6 steel ribs provide enhanced durability to this umbrella. This umbrella has a crank handle, which can control the opening and closing of the umbrella. It has an air vent at the top to stop the wind pulling the parasol upwards. It also helps to keep you cool when you're sitting beneath the canopy while adding extra stability(base is not included).