Review on 🏋️ Vikingstrength Adjustable Resistance Workout Mask with High Altitude Elevation for Running, Biking, MMA Endurance and Air Resistance Training by Robert Hole

Let me start with the positive: It restricts airflow, but only under certain conditions, which leads me to the bad. It restricts airflow, but with 1 valve it's too easy to breathe, even on full crossfit and interval training, no matter the level (2 levers with 4 settings each) didn't feel any difference at any setting. (Adding a facemask over this mask actually helped restrict airflow.) On the other hand, the 2 valves are very difficult even on the lowest setting, which makes me feel the mask has potential for my purposes. I actually feel the need to focus on my breathing while exercising. Another downside was the strap, it had to be one size but I think my head is too small and I had to tighten it my way otherwise the mask doesn't let me breathe normally even with two valves. Overall it has helped me focus my breath which is why I gave it 3 stars