Proberos® Breathing Trainer, Portable Muscle Trainer, Exercise Trainer with Resistance Adjustable, Easy to Clean and Use, Improve Strength and Endurance

It's good. Does what it says, I can actually feel the improvement in my chest and throat after using this. Very easy to use, just grip it between the teeth. The instructions say to breathe in and out through the device, I prefer to breathe in from nose and only exhale through the device. I'm ordering 2 more for my wife and mother.

Good for forced exhale practice Increase lung raw power of exhalation which make running very easy. The product easy to use. Value for money and best durability. We can easily wash.

Nice product.good fit Quality is super Nice breathing while brisk walk

Good

Very Nice product, you can see the difference on your first use itself

Vey bad please I'm wearing u never buy from here 300 money loss

I have been using it for a while now. There is a noticeable change after using it. Initially it felt a bit weird but got used to it. I use it during the workouts (for 10 mins).

I used it few times and it really works well. For the price it's a must have for workouts.