Review on 🏃 GO2 Endurance Workout Device: Enhance Breathing & Oxygen Flow During Running, Cycling, and High-Altitude Activities - Made in USA by Mike Sutherland

I wanted to like this thing but they just throw too many crooked balls at you to use properly. No instructions, no usage tips, this thing just pops out and you're on your own. It could be half used if you didn't drool too much all the time while you had it. You can't focus on your workout if you have to pull it out while running or spitting on the bike or constantly wiping your mouth during exercise. It's quite annoying to use honestly. I wish I could just pay extra for the Aerofit. This thing costs too much to be so unfinished.