It does a very good job of protecting your teeth and your mouthpiece.

These mouthpieces allow me to stop worrying about my child's teeth while he plays his saxophone

They make it so my teeth are more comfortable on the

They have a chemical/ medicinal smell, cause bitterness in the mouth (which is really scary), and don't last long (well, maybe it's my sharp front teeth, I don't know, but brand-name cushions all lasted me much longer).