Adurance Training Workout Mask, 4 Breathing Oxygen High Altitude Training Mask Exercise Device

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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
WARRANTY – Backed by Aduro Sport Lifetime Limited Warranty and friendly US customer service, buy this Elevation Workout Mask with confidence