Upon receipt of the umbrella cover and multiple use I was impressed by the function with the built-in mounting aid. Unfortunately, the zipper moved on after only 10 times will use, although I have always kept free of tension when closing the zipper. The RV then could no longer be close. A shame for an otherwise good product. A praise goes to Amazon for quick and easy return and refund the purchase price. Now I'm going to try it with another more than twice as expensive product.
