0 of 1 people found the following review helpful
3.0 out of 5 stars
Difficult to fit correctly, 6 Feb 2014
Even following the instructions very carefully, we ended up failing completely with the first (which we had to throw away) and getting only a mildly satisfactory result with the second - it still keeps dropping out of my son's mouth. If you can get them professionally fitted, I suggest you do so, it's worth the extra investment.