Why choose Aduro Sport? Because we back our High Altitude Training Masks with a lifetime limited warranty and 24/7 US customer service, so you can buy with confidence and have peace of mind HIGH ALTITUDE MASK - Aduro Sport mask challenges yourself to exercise better and increases your overall endurance Lung Capacity – Helps expand and improve your breathing without having to do tons of cardio training and long strenuous workouts Comfortable to Wear - We designed this fitness oxygen mask with sturdy breathable elastic straps, comfortable to wear during exercise Works Great - 4-stage adjustable mask breathing level makes the simplest tasks more challenging and your workouts more intense to suit your needs
