- Portable respiratory trainer designed to improve lung capacity - Made of high-quality silicone, a safe, odorless, and eco-friendly material - Fully adjustable resistance to customize inhalation and exhalation training - Fits comfortably in the mouth, easy to use and clean - Promotes lung expansion, reduces congestion, and strengthens respiratory muscles - Recommended for athletes, swimmers, singers, seniors, and those looking to improve their respiratory health - Lightweight and compact, ideal for travel or commuting - Suitable for breathing training, swimming support, running, and daily activities - Effective tool to increase lung capacity and physical endurance