Sparthos High Altitude Mask - Simulate High Altitudes - for Gym, Cardio, Fitness, Running, Endurance and HIIT Training [16 Breathing Levels]

I bought this for my wife for her training. She says she loves it and it works although she thinks the size is a little big for her. Quality is great and looks durable. Just make sure you clean it after each use. Very light and made for training/cardio.

Just got back from 5 miles of roadwork. This product is legit. As soon as I took it off, I noticed my lung capacity increased. I feel amazing and after the first use of this product, I can already tell you this is absolutely worth it especially for the price. The size is fine I have a big nose though so it kinda is annoying pressure absolutely amazing mask it’s kind of hard to believe how they can sell something so good for so cheap. I appreciate companies like this. Not to mention how beautiful the Boxing and the case is. Very impressive design! If there is any product out there, that’s beneficial for the people at a good price. This is at the top of the charts.

Works well, super comftorable, I just wish it was tougher to breath through, I can put it on the hardest difficulty while I sleep and its not too bad

Quality product amazing addition to my workout routine very easy to use and great response with breathing exercises.

This product works very well! It can turn long walks into decent cardio. It also makes you breathe properly and develops diaphragm muscles. Great for whatever goal you have!

Sensational. Comfortable, easy to use, &adjust.

It can help restrict air flow to aid maintaining a higher heart rate. On the higher levels, practically impossible to breathe in.

Comfortable, with lots of adjustments. I like that you can restrict both the inhale and exhale independently. I also like that it disassembles for cleaning. I think I'd let the strap air dry instead of tossing it in the dryer to preserve the elastic. Easy to take apart and reassemble too. One thing to consider is that this does take up a bit of space on your face, in particular in the nose area. The result is that if you need to wear glasses while you exercise, there may be fit issues. Otherwise this is effective and well thought out and built. 2 thumbs up here!

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Not heavy, and have multiple levels

This mask is very good! It helped me train for my Acatengo hike.

Excelente producto 100 por ciento recomendable