Fitness Trainer Lung Respirator

Silicone Mouthpiece Exercise Training Equipment Accessories
Characteristic:
Breathing exercise equipment to challenge yourself for a better workout and improve overall endurance.
Vital capacity: Helps expand and improve vital capacity without the risk of having to do a lot of aerobic exercise and burn calories.
The Portable Device-Adventure Lung Breathing Training Instrument is very compact. Easy to carry.
The adjustable resistance dial makes the simplest task more difficult and you can exercise more intensely according to your needs.

Specification:
Material: silicone
Product size: 9.5*5.5cm/3.74*2.16in