3PCS Jaw Shark Toner for Men & Women, 3 Resistance Levels Silicone Jaw Toner for Beginner, Intermediate & Advanced Users, Jawline Exerciser, Jaw Exerciser (Aqua/Green/Black)

Very good product

Very durable but comfortable design without being expensive. Easy and quick to use. The only issue I've had is creating a suction through the side vents, but it's not serious problem.

It works and gives your jaw a workout but the suction pinches you cheeks.

They do the job, but they are big and uncomfortable. I had to take an exacto knife and trim mine a bit because they are so big.I do like that they come with a case.

My jaws are getting stronger toned and also helped my face structure by making it look sexy af, I train my neck along with this method they go well together.

Don’t recommend! They hurt the inside of my mouth and are way too big. Regret the buy.

It doesn't come with instructions if you're looking for exercises. But I'm sure you could look that up on the internet. I got this because I'm going through PT for my TMJ disorder. And all I need is something just to hold my mouth open while I'm doing my exercises of just holding. So this is an absolutely perfect for what I need.

There are holes on each side which create suction inside your mouth and tear the flesh inside your cheeks. Also, too big. If they improved those two features I can see this being a good product.