BoxRec

I know a few that use it. He actually brought it out before that gay Training Mask.

I'm flat against it.

As Liddell says in his book, what's the point unless you wear it all the time as your body adjusts to oxygen again.

Pretty much - you can do what Wanderlei does and just tape a snorkel to your mouth and put a swimming peg on your nose.

It's a lot cheaper.