Increasing 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 offers four levels of resistance which allows you to work on breathing power, inspiratory muscle strength, and breathing technique.

• 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 of 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

Shipping Note: Shipping to Alaska, Hawaii, PO Boxes, and APO addresses is not available for this item

Warranty: Auduro 1-Year Limited