The one at ssinserts is UV protection, mine is in the sun also, when it's not raining, and you have to put the cover somewhat on and mark where the hole goes for the antenna, cut it out and 2 iron on patches for both inside and out of the cover for re-inforcement. I've had mine for pretty close to a year and it is holding up very well.

Correction: I unscrewed the antenna, put the cover on, then marked the cover where the antenna goes, cut a small hole then took it off and ironed on the patches and then trimmed the hole around the patches for clean-up.