Improve Endurance: Use the muscle trainer to enhance respiratory muscle endurance and improve breathing capacity. At the same time, expand the diaphragm. Strengthen your respiratory and abdominal muscles through professional breathing training, and ultimately improve your sports performance. Exquisite Pure Silicone Design: Our breathing trainer is made of ultra-soft pure silicone, designed to provide users of all levels with an excellent respiratory muscle training experience. Its stylish and compact design combines comfort and portability, allowing you to enjoy the fun of training anytime, anywhere. Adjustable Resistance Levels: Customize your training with the adjustable resistance valve, allowing you to adjust the intensity according to your abilities and fitness goals, ensuring maximum efficiency and performance. Portable and Easy to Clean: The lung trainer is small in size and can be easily put into a handbag or pocket, allowing you to exercise anytime, anywhere. It is easy to disassemble and clean to ensure your long-term hygiene needs. Breathing Resistance Trainer: Suitable for a wide range of people, including athletes, musicians, and everyday users, it is especially beneficial for endurance activities such as swimming, track running, gymnastics, martial arts, and other high-energy sports.