Good value.
Seems to work with a little diligence, but to be fair, my jaw is already rather defined (lucky me!). Read more

CJing
Product video 1
Rated 3.8/5 across 124 reviews — opinions are mixed.
Customers find the jaw exerciser effective, with one mentioning it helps work out the masseter muscle.
Generated from the text of customer reviews
Seems to work with a little diligence, but to be fair, my jaw is already rather defined (lucky me!). Read more
Holds its resistance, feels like an exercise UPDATE: Each pair breaks down after a few days of day-long nonstop chewing; not a dealbreaker but keep this in mind Read more
Doesn't stay in my mouth that well. Its okay. Read more
Came in a good condition. Hope they will fulfill my expectations. Read more

They were very poorly made. My son has been buying the jaw exercisers and these fell apart in a week and a half - All four (4) sets. I am retuning and won’t purchase any other items from company. Read more
Easy to use, durable and you can feel the work out Read more
I just got the advanced level exercisers from the get go and ive not used them yet but at first feel they are pretty hard rubber. I'm sure they will work but id suggest getting a lower level version of these but not the beginner. It would be better and more durable to get a mid level version and not start out at the highest level. Only reason i got the highest level is because alot have said that they are more durable then the lower level ones. The rubber squares come in a small paper box and are inside a plastic case they come in with no instructions so you should already know what to do with them because there are no instructions. Read more
I've noticed some definite changes in my facial structure since using this. It differs from a jawzrsize simply because you're biting with your back molars instead of your front teeth. In effect this will not only work out your masseter muscle but also your entire face as well. Have you ever had a legitimate face pump from a jaw workout you did?? Looks pretty intimidating the first time seeing it lol! So, if you're looking for a more defined jawline or simply just a stronger looking more pronounced face in general this will most likely work for you if you are consistent! Just be prepared to replace the pieces every now and then as a couple of mine already started wearing down after a few weeks of use 😅. Only reason for the 4 star rating instead of 5. Try it, but don't overdo it right away. Just chase the pump, and watch the progress happen over time. ✌ Read more
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