toyofmine Breathing Fitness Exerciser, Lung Breathing ExerciserS Adjustable Resistance Help Breathlessness

Provides the widest range of inspiratory/expiratory resistance levels to meet anyone’s needs. From the low resistance of respiratory rehabilitation patients, it gradually increases to the high resistance level of competitive athletes. Improve endurance, breath holding
There is only one moving part. Rotate the valve to the left to reduce airflow to create more resistance, and rotate it to the right to reduce resistance.
You can take it with you and use it anywhere (pocket size). Very comfortable. The flexible medical-grade silicone mouthpiece is very comfortable and provides excellent fit and tightness. Once in your mouth, you don’t even need to hold it with your hands.
Heavy-duty plastic structure and 100 anti-rust. Due to natural aging, pollution, poor physical condition and smoking (if applicable), it will open up the airways that have been partially blocked for many years.
The breathing muscles (diaphragm and intercostal muscles) will be targeted and developed to help you draw more air/oxygen into your lungs and exhale more carbon dioxide.