D
Darrin Klein Works very well helps me breathe better and expanded my lungs
C
Carlton Parisian As described. I would recommend.
I
Ina Lebsack Restricts about 90% of your oxygen intake so it will truly put a tremendous stress on your lungs to help increase your vo2 max and lung capacity
V
Vanda Hand Great items came is as described.
D
Delilah Carter What you see is what you get!