Tookie Scuba Diving Mouthpiece, Denpetec Scuba Diving Mouthpiece, Practical Gear Silicone Bite Moldable Scuba Diving Dive Mouthpiece Regulator with Tie Wrap for Adults(Black)

No instructions came with this product so cannot mold it as intended.

This is great, I'm using it on a cressi compact regulator, I put the mouthpiece in warm water for 1min then bit on it for around 2 to make it form around my teeth, after I cut off the excess material that was touching my gums and its been perfect every since, it says in place with no effort when scuba diving no biting or jaw fatigue

Great mouth piece, easy to mold to your mouth and installation was a breeze

Instructions were in some other language. Read what others put on how to use it and one melted.

This mouthpiece is awesome. I always had problem with my mouthpiece on my snorkel no matter which one I purchased. I tried many styles and sizes, nothing worked. I either chewed on it and destroyed it or my jew and gums were hurting. Recently, I spent about 8 hours a day.... under the water, 5 days in the row...and.....my new mouthpiece is intact and my jew is not hurting.......I will have to upgrade all the mouthpieces on the snorkels for the whole family. I felt bad that I am the only one not complaining about the snorkel not fitting properly!!! What a change, what a great product!!! Thank you very much....