April 11, 2019

Kenneth B.

Dear Bas Rutten,I wanted to tell you how impressed I am with your O₂ Trainer. Since purchasing it, I have used it with my Krav Maga […]
March 22, 2019

Al (verified buyer)

“This thing is rough, working out with an o2 trainer, is not only good for your stamina, but it also helps your mental grit.”
March 22, 2019

Ken Bak (verified buyer)

“I have used the O2 Trainer since it’s release and am quite impressed with it. I use it for Krav Maga and Law Enforcement training. It […]