OXYGEN ADVANTAGE SPORTSMASK | Designed by Breathing Expert Patrick McKeown | Altitude Training at Sea Level | Training…

✅ SCIENTIFIC – Only Sportsmask designed for use with the scientific technique to perform altitude training at sea level [Oxygen Advantage]
✅ EXPERT DESIGNED – Designed by internationally renown breathing expert Patrick McKeown
✅ INCREASED PERFORMANCE – Delayed onset of fatigue and lactic acid, improved aerobic performance, strengthen core and breathing muscles, reduced breathlessness during exercise
✅ ADAPTABLE – Secure grip head straps to ensure mask stays in place + Varied resistance settings for your training needs
✅ PATENTED – SportsMask Patent Number US9914017