Description: 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: 1pcs* Lung Capacity Exerciser Device Notes: 1. Duetothelightingeffectsandphotographing angles,thereis acolordifferenceintheproduct, pleaseunderstand. 2. Duetomanualmeasurement,thereisatoleranceintheproductsize. See more product details 1.Enhance Your Endurance: The Breathing Exercise for Lungs helps improve your breath, so that you will have better endurance and feel better day by day. 2.Helpful and Effective: Makes it possible for you to exercise core muscles, Lung Exerciser Device will strengthen your lung capacity and help you adjust the abdominal muscles. 3.Variable Resistances: Thanks to the design of adjustable resistances, Deep Breathing Lung Exerciser provides you with different resistances levels and allows you to adjust accordingly. 4.Better Body Performance: As an exercise tool to build up your breathing and abdominal muscles, Breathing Trainer for Lungs helps improve your overall performance. 5.Lung Capacity Development: Allows you to from the reduction of the accumulation caused by body waste, Lung Endurance Trainer enhances your lung capacity. _x000D_