Ken Bak (verified buyer)
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 has improved my breathing and overall training.”
“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 has improved my breathing and overall training.”
