Review on Waterproof UV Sun Tyre Cover for Trailer, RV, SUV, and Many Vehicles - 15 inch (I Go Where I'm Towed) by Abu Nelson

The cover is not waterproof at all. Based on our own experience, it didn't keep our car dry in a light rain, let alone a heavier one. The material feels cheap and the straps are not strong enough to keep it in place. The only upside is that it is relatively easy to put on and take off. However, it simply doesn't perform as advertised and doesn't protect your car from the elements. We do not recommend this product.