New Version Lung Trainer - Dual-Mode Lung Exerciser - Portable Breath Trainer for Everyday Use - Includes Workout Guide for Effective Workouts - Breathing Exercise Device

Practice your breathing with this device and steadily watch your time lengths grow longer and stronger as you practice building up your lung strength.

The design is comfortable and easy to use. The resistance is easily adjusted using the twist knob on the end of the device.

This air flow restrictor works well in performing the primary function of restricting air. It is not very heavy, so can easily be kept in your mouth without bouncing around. It did teach me that I run with my mouth open because it did feel awkward to run while forcibly keeping my mouth closed.My only complaint is that the full open, least restrictive position still restricts too much air. I feel that position should be almost normal airflow, not restricted at all. Perhaps that is normal for these types of restrictors, but it was not what I was expecting. The quality of the unit is good, there is no strong rubbery taste, and it does its primary function well.Too early to tell if it’s helping my cardio, but it definitely makes the runs harder when I’m using this. I honestly can’t use it for very long yet (maybe 1 minute at a time) without having to remove it to breathe normally. But I expect that duration to improve over time.

Comfortable enough to use during sets. Easy to use, fit is perfect.

It’s a perfect amount of bite pressure and give that these allow. Good product.

Perfect in size.. can't wait for ie tea on the front porch... So excited..l

If your looking for something elegant to DIY, this is it.

Ordered to try to strengthen my lungs as someone with lung related health issues. Seems to provide some restriction to work the lungs a bit but the adjustment is either so minor it's not noticeable or it doesn't work. Overall not a bad product but I'd probably look at other items over this one.