This waterproof umbrella cover blocks 99% of the sun to prevent fading to umbrella fabric. It is also wind resistance when fully closed. It fits up to an 9 umbrella. A 360 degree auth-locking draw cord system allows you to cinch the cover tightly. There is also a heavy-duty, rust-free nylon zipper and runs the length of the umbrella cover; which makes it easy to put on and take off.HIGHLIGHTS:4 Width x 4 depthStrong, lightweight, waterproof materialPolyester fabric360 degree auto-locking draw cord systemHeavy-duty nylon zipperProduct dimensi