I use them on my travel trailer tires so the sun doesn’t bake them. My trailer sits in the backyard, uncovered, when not in use. I installed all 4 tire covers easily. They slide over the top of the tire, have a snap in the back that latches one side of the cover to the other, and the front (visible side) hangs down a bit further to make sure the front of the tire is completely covered. They are doing the job I purchased them for. These are my first tire covers I have owned so I don’t have anything to compare them against. So far, I am satisfied and am glad I made the purchase. I recommend them.Update: A year and a half later - I’m still using them everyday and they are still in good condition.