Package Content: You will receive a piece of breathing exerciser device, which can train your muscle.
Premium Material: This product is made of premium silicone and ABS, reliable and lightweight and not easy to break, you can use it with a confidence.
Practical Design: This product can help you exercise certain muscles and improve breathing function while exercising.
Easy to Use: Our product is easy to use. Turn the valve to "+" to increase resistance and to "-" to decrease resistance.
Easy to Carry: The breathing trainer is easy to carry. It can be taken when you go out, it doesn't take too much space. Convenient for you to use anytime and anywhere.