High Altitude Mask, Training Workout Mask Men to Improve Lung Capacity, 24 Level Breathing Resistance Fitness Mask to Upgrade Endurance, for All Sport: Running, Cardio, Cycling, Gym, HIIT

Works great just what I expected. It makes for a tough workout but that’s the point really. it comes with extra filters and valves to adjust your difficulty. Right size fits comfortably. Low cost. I felt my breathing was improved during my workout. it help increase lung capacity and makes lungs to work hard getting the oxygen. It is perfect mask for people who loves workout.

Good

Exactly what i was after.

Mask doesn’t fit perfectly well but found that if i make the neck strap tight as possible it will do the trick. This mask is absolutely insane and makes me want to quit when i do cardio on the medium setting (which is a good thing). Doing hard cardio on the hardest setting makes me want to pass out (which means it’s doing my job). Would recommend

This mask is great for boosting your training intensity. It made me feel like I couldn’t breathe after only one minute of running in it, so it definitely does the job! The only issue with it I had was the mask kept sliding down my nose and I had to keep pushing it up during my run.