Ergonomic Design: This breathing trainer features a unique U-shaped design with textured handles for a comfortable and secure grip during respiratory exercises. Versatile Usage: Suitable for athletes, singers, musicians, and anyone looking to improve lung capacity, endurance, and overall respiratory fitness. Progressive Resistance: The adjustable air flow control allows you to gradually increase resistance for a more challenging workout as your lung strength improves. Portable and Compact: Lightweight and travel-friendly, making it convenient to carry and use anywhere, anytime. Durable Construction: Crafted from high-quality, BPA-free materials for long-lasting performance and safety during intense training sessions.