Very useful for me

Seems to be working fine, nice regulation system and after washing does not taste strange like other models. Perfect.

Very good i can breathe my lungs feel better

Good

This is a good product and helps u a lot

It’s helping me breathe

Got this for my friend, haven’t tried it but looks pretty good!

Words very well and just as descriptive

It is pretty clear that this product is good cuz my lungs feel much better

It’s good works good

Works, however not perfect still functional, and decent quality

Is great it helped me a lot with football

It was great and works well try it out

Very very nice

It’s great

Great for runners who are usually out of stamina. Would definitely recommend. Took about 6 days to deliver.

soo good

Very nice

good

Nice

You guys delivered it really fast!👏👏

works well, comes with instructions. the mouthpiece is silicone

Reallly good