Bought for my 10 year old daughter who grinds her teeth at night. Took us about 30 minutes to pour it. You should quickly insert it into your or your child's mouth, pushing up all sides so that it conforms to the shape of your teeth. It cools too quickly, making molding difficult. I would say it's a bit big for her mouth too. And it would be better for someone over 12 years old. The price for an item with a good margin, but the Guardian's ease of use is a nightmare.
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