This Durance High Altitude Training Mask is an essential piece of training equipment for any athlete looking to improve their endurance and stamina. With its innovative design, you can simulate the effects of high-altitude training without having to leave your home or gym. 

As mentioned, this mask is brand new and comes in its original box, ready to use right out of the packaging. It is suitable for a variety of sports, including boxing, martial arts, and MMA. With its adjustable resistance levels, you can customize your training to suit your individual needs. Improve your performance and take your training to the next level with the Durance High Altitude Training Mask.

Please let me know if you have any questions!