Bigbreathe Brest Mask - Breathing Mask for Exercises, Cardio Workouts, Running, Increase Sports Performance, Workout Tolerance, 9 Resistance Levels, Detachable(S)

["Bigbreathe BreST Mask is a mask that maximizes your sports performance, endurance, fitness, and stamina with respiratory muscle training. This mask, which has nine resistance levels, uses a self-developed pressure control device, allowing more sophisticated and powerful air resistance than other masks that adjust only the hole size of the air entrance.","For Better Sports Performance and Fitness | Wearing this mask during workouts and sports activities makes your lung work harder and oxygenate more blood. Just like muscle training using dumbbells, you can increase your respiratory muscles and lung capacity using the resistance this mask adds for inhalation. Stimulated lung helps you burn more calories faster, leap beyond your limits, and sustain your workout longer than ever.","Step-by-step Growth in Sport | You can choose the pressure level you want among nine adjustable breathing levels by turning the lever left or right. You don't need to take the mask off to change the intensity. As it provides multiple resistance levels, anyone from beginners to pro sports athletes can use this mask for efficient training.","Easy to Clean | To clean this product, remove the band and hand-wash it with water. Then separate the cover, the inner frame from the body, and the intake cutoff and pressure control units. (You must disconnect the cover and inner frame from the body before removing the cutoff and pressure control units.) And wash them using water. Then dry them entirely so the spring inside the pressure control unit won't rust."]