Breathing Trainer

Breathing Exerciser for Lungs helps you improve your endurance, exercise breathing and abdominal muscles, and decrease the accumulation caused by body waste, therefore strengthening your overall performance.
Specifications:
Product Name: Breathing Trainer
Size: about 5*10cm/1.97*3.94inch
Material: Silicone, ABS
Weight: about 68g
Use: Aerobic exercise
Packing List:
1 pcs* Lung Exerciser Device