The JawzrPro is a molar-based jaw exerciser: a chewable mouthpiece you bite down on to load the masseter, the large chewing muscle. It comes in small and large fits with 20 or 30 durometer resistance, so beginners can start light and work up. It is a niche tool with no real rival in mainstream fitness gear, and buyers report a sore jaw after the first sessions plus a firmer jawline over time. Some owners say the mouthpiece wore through within a week, so durability is the main risk.
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Lowest price we've seen: $29.99 on Nov 1 at Jawzrsize. Tracked across 1 store since Nov 1.
Buyers who stick with it report a comfortable fit, strong resistance and a noticeable jawline benefit, and some say snoring eased. The recurring complaint is durability: at least one owner had the mouthpiece break through after a week.
The JawzrPro Mouthpiece is a jaw exerciser that applies resistance through the molars. It is designed to work the masseter, the largest chewing muscle in the jaw.
The ergonomic design keeps the trainer in place and spreads pressure across the molars. You bite down in a natural chewing motion, and the resistance stays controlled on each rep. It is made from strong, food-grade, BPA-free materials.
It comes in small and large fits and in 20 or 30 durometer resistance. The 20 durometer gives lighter resistance and the 30 durometer gives stronger resistance. A holster case that attaches to a waistband is included.