The Adurance Training Mask lets you achieve the effects of high altitude training by regulating how much air you breathe in with the 4 Level Air Flow Regulator. You can then reduce the amount of training time by getting the same results in a shorter amount of time. You will also increase your lung capacity and will constantly push your training limits to the fullest!

• Adurance training mask challenges you to have a better workout and improve your overall stamina
• Helps to expand and improve your lung capacity
• We designed this oxygen mask with sturdy, breathable elastic straps so it's comfortable to wear during your exercise routine
• 4 Levels to adjust your breathing mask so you can make your workout more intense
• One size fits most - from 120 to 230 lbs