Adurance Breathing Exercise Device, Lung Health Exerciser High Altitude Training Device with Adjustable Resistance Levels

BREATHING EXERCISE - Adurance breathing exercise device challenges yourself to perform the better workout and improvement of your overall stamina LUNG CAPACITY - It helps to expand and improve your lung capacity without having to do a ton of cardio and risk burning calories PORTABLE DEVICE - Adurance lung breathing trainer is extremely compact. With this device, perform your daily training wherever you are WORKS GREAT - Adjustable resistance dial 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