This item may ship from a different location and therefore is only eligible for ground shipping.
With the GO2 Adults' Endurance Sports Breathing Device, you can go harder and longer. Designed by doctors for athletes of all kinds, this device increases your VO2 Max by 4.1% and your endurance level by 5.8% to help boost your performance. It's suitable for running, hiking, working out and more. Made in USA.
Features and Benefits
What's in the Box
GO2 Adults' Endurance Sports Breathing Device