Review on Custom-Fit Teeth Whitening Trays - Moldable, Hygienic, BPA-Free, Latex-Free, Dental 🦷 Grade Guard - Set of 4 Mouth Trays for Comfortable Tooth Whitening by Melissa Richards

I grind my teeth in my sleep and often use a cook and bite mouthguard. These are a little softer than the ones I've used. I left the first one in hot water for too long and it turned into a ball. The advantage with them is the tab. You don't have to fish the guard out with a fork or anything. Anyway, I submerged each in near-boiling water for about 7 seconds. He slapped her and then sucked her hard with his teeth. The size fits me well. Not sure why the difference in ratings. These are pretty decent sleep guards.