The Training Mask is a Performance Breathing Trainer and is a cutting edge respiratory conditioning device. Training Mask will elevate your fitness, stamina, and endurance by increasing your capacity for high intensity exercise. 24 Resistance Levels: Our mask has 24 resistance levels from beginner to pro. Its multiple resistance levels allow you to work on your breathing muscle strength and techniques. You deserve a training mask that works as hard as you do. Boost Training Performance: The running mask maximizes the benefits you get from your workout results. The mask breathing exercise devices were engineered to apply variable levels of tension to the breathing muscles by controlling air flow which increases tension on your breathing muscles. Highest quality Mask: Our Sports mask is made from superior quality material and stitched with perfection. It does not rip off easily and you won't face any holes or breakages. workout masks durable and lasts longer than some other masks. For all fitness levlels: Whether you are beginning to train your respiratory muscles or you are a professional, this high intensity mask is suitable for everyone. The gym mask resistance levels are customizable, you can adjust them according to your level.