I live in Kansas and we can have rain, ice, and snow. I covered all of my chairs and left them outside all winter and early spring. When I uncovered them, the furniture was in perfect shape!Because the covers are of significant weight, of a very high quality material, and have velcro straps for the bottom of the legs, they don’t blow off or rearrange themselves. Additionally, the covers themselves showed no wear from the elements or sun. These covers are just an excellent buy and do an excellent job of protecting the furniture.