Description:Breathing exerciser: helps to increase lung capacity and is a breathing trainer or breathing trainer that improves lung strength and capacity

Function: Oxygen Intake, Reduce Shortness of Breath, Improve Shortness of Breath, Strengthen Lungs: Inhale/Exhale

Adjustable: Adjust the breathing resistance by manual rotation, suitable for training in different occasions

Application: Specially designed for athletes, pilots, singers, , etc

Versatile use: Made of reliable quality, durable silicone

Suitable for swimming, diving, running, fitness, cycling and many other occasions

Specification:material: siliconeSize Chart:10cmx5cmx3cm/3

94inchx1

97inchx1

18inchPackage Includes:1 Breathing Exercise DeviceNote:Please allow slightly errors due to manual measurement and different monitors