Double-sided tooth guards for adults

Material: Environmentally friendly silicone (non-toxic) 

Instructions for use: Put the guard into the boiling water of about 70 degrees, about 20-30 seconds, so that the teeth are soaked. Then put it into the user's mouth and gently bite the teeth with the upper and lower teeth for half a minute. Make it fully stereotyped. The same user can be reused. If you use it for another person, please repeat the above setting operation.