High Altitude Mask

Increase your inhalation load while training is like lifting weights for your breathing muscles. More respiratory power and stronger breathing muscles will supercharge your stamina and endurance. Adurance's training masks offer four levels of resistance which allows you to work on breathing power, inspiratory muscle strength, and breathing technique. Features: High Altitude Mask - Adurance training mask challenges yourself to perform the better workout and improvement of your overall stamina. Never used. New in box.