Top critical review
OK FOR SPORTS BUT,.... "AGGRESSIVE NIGHT TEETH GRINDERS" BEWARE!
Reviewed in the United States on February 18, 2020
These guards might be ok for sports, but in my case, I am an aggressive night teeth grinder, after I began to use this guard I noticed a very "Slight Bitter" after-taste in the mornings. When I got ready to rinse it at night before use, I began to notice a dry white residue. I looked at the residue under a scientific microscope and found out what I suspected they were loose PLASTIC particles!....needless to say, I don't care what kid of plastic it is, swallowing it can't be good for my health...