GO4FIT Workout MASK | High Altitude Elevation Simulation | Training, Breathing, Running, Cardio, Fitness | Resistance Training Endurance MASK | Gym MASK (Universal Size - Black)

I bought both the GO4FIOT Mask and the Sparthos Mask.These masks are EXACTLY identical to each other, except different logos.The GO4FIT is at a lesser price right now so it's clearly the better choice if you don't mind that black is the only available color.The product itself is comfortable for me and it does what I wanted it to do, which is to restrict air flow. I think that you can adjust whether to restrict breathing in or breathing owl by configuring the internal valve. I use mine on the maximum settings.

This training mask is really worth the money. It helps me regulate my breathing while training and makes my body work harder.First time I used it was on a cold late night run and it was perfect

if i had dropped this review close to the time i purchased this item it would not be nice becasue i felt it wasn't tight hugging enough but here i am, many many months later and through hundreds of uses and the item is still going strong. i use it a lot and have no issues, it washes up nicely and easy to stick back on. I use the very last dial on it as that is the point where i feel it working.

Mask looks pretty good and it is very easy to use, adjusting the levels of intensity is also super easy. my only complain is that the mask comes in a universal size and the velcro could be tricky to get right which has cause the mask to slide down for me when im sweating and that caused a red rash on my check from the friction. besides that very good value

Makes you look like a freak, design is cool, doesn't do anything except basically try to suffocate you, do not recommend

It was my mistake, I was wearing it incorrectly. I changed my rating to 5 stars and communicating this suggestion.Any product made, it could be very easy to make use of it but it requires to make an user manual for it. I will still leave the 5 stars since I

Just used for the first time today. At the lowest setting it restricts your breathing. Can't use it when I run. Will take some getting used to. Does what it says it will do.

It did not fit as expected to fit it was very heavy and I had the most difficult time returning it I still have it and have no use for it it doesn’t even look like the picture