Is there warranty on this? as for the black set there’s small black pieces coming off as i doing the exercises. looks like pepper as i spit out.

I experienced very similar defects. Which is part of the reason I discontinued use.

I wonder what they do with returns? Very afraid of being sold a returned product. Anyone know?

Hi, our returned items are disposed by Amazon's warehouse team so that no returned item is ever delivered to a new customer. You can use our items with ease of mind.

if my front four teeth on the top are veneers can I still use this product?

Since our products are used with the molar teeth your front teeth veneers should not be an issue. However, we would advice you to be extra careful while using the jaw exercisers and to always position them correctly on your molar teeth.

Is it ok to use this with a dental crown on one molar tooth?

Yes, these can be used with crowns.

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🔥 Chew Your Way to a Chiseled Jawline 💥

SAFE SMART DESIGN - Ergonomically crafted to target masseter muscles without risking teeth, gum, or joint damage—train confidently every day.
DISCREET ON THE GO TRAINING - Miniature size and included carrying cases let you exercise your jaw anytime, anywhere—no one will even notice.
SCULPT DEFINE YOUR JAWLINE - Boost facial blood flow and oxygenation to slim and tone your face with just 5-10 minutes of daily use.
VISIBLE TRANSFORMATION GUARANTEED - Join thousands who’ve seen real before-and-after results or get dedicated customer support to ensure your satisfaction.
TAILORED RESISTANCE FOR EVERY LEVEL - From beginner to expert, customize your jaw workout with 3 silicone trainers offering 30, 40, and 50 lbs resistance.

The Mayena Jaw Exerciser Set features 3 food-grade silicone trainers with resistance levels from 30 to 50 lbs, designed to safely target and tone jaw muscles. Compact and discreet, it fits seamlessly into any lifestyle, delivering visible facial slimming and definition with just minutes of daily use.