- Portable device for breathing training and lung strengthening - Made of high-quality silicone, safe, odorless, and environmentally friendly - Adjustable resistance allows you to adapt the exercise to different needs - Improves lung capacity, sports endurance, and cardiorespiratory function - Easy to use: inhale deeply, hold your breath, and exhale slowly, repeating the process several times - Lightweight and compact, ideal to take anywhere and use at home, the gym, or outdoors - Recommended for athletes, singers, smokers, and people looking to improve their respiratory health - Includes 1 breathing trainer measuring 10 x 5 cm in white