I researched these cases quite a bit before purchasing them. I have learned that they must have scientific research behind them to confirm that they work. have these. Beetles shouldn't be able to bite through. The zipper is also very important. They have a patent for the zipper. They actually have a zipper to prevent them from accidentally opening. Well that's peace of mind if you ask me! Everything I read pointed to this particular brand so I was confident in buying it. They were easy to put on. They are very quiet for sleeping. We didn't even realize they were on the mattress. We also have them on our pillows. They didn't seem to let us sleep any hotter than usual and that was important. We sleep very hot and prefer to sleep as cool as possible. We just got heat treated to kill the bed bugs and put them in their place. It's been two nights since we put them on and four days and we haven't noticed anything. I think the heat worked. I hope we got them just for reassurance. But in any case we seem very happy with the purchase and would highly recommend them.
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