Portable Lung Capacity Trainer, Fitness Gym Running Diving

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Description:

Food grade high quality silicone material very safety, soft and comfortable
Designed for boosting your stamina and improve lung capacity respiratory breathing exerciser
Also help to strengthening respiratory muscles abs easily and quickly increase your breath endurance.
Help you to inhale more volume of oxygen into your lungs and to exhale more carbon dioxide out.
Adjustable resistance dial allows you to adjust resistance according to your own physical condition

Specification:

Material: Silicone
Size: 21x12x3.5cm/ 8.26x4.72x1.38 inches

Package Includes:

1 Piece Breathing Exerciser Mouthpiece

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