Gym Lung Exerciser Food Grade Silicone Fitness Lung Expanding

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 inch Package Includes: 1 Piece Breathing Exerciser Mouthpiece When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!