Adurance Peak Resistance High Altitude Face Air Mask Workout Training Mask NEW*

NEW/OPEN-BOX HIGH ALTITUDE MASK - Adurance training mask challenges yourself to perform better workout and an improvement of your overall stamina LUNG CAPACITY - It helps to expand and improve your lung capacity without having to do a ton o cardio and risk burning calories COMFORTABLE TO WEAR - We designed this oxygen mask with sturdy breathable elastic straps, comfortable to wear during exercises WORKS GREAT - 4 Level adjustable breathing mask makes simplest tasks tougher and workouts more intense as your needs