Quippy wrote a review of Airblaster Ninja Suit - Men's on January 9, 2013
Familiarity: I've put it through the wringer
I do think this is the best long underwear available. This is after using the Ninja Suit extensively for the last 6+ years. Its the most complete protection, super versatile, and you don't have to give up any of the convenience that you might think you would for a one piece thanks to the waist zip (doesn't come apart, just opens up completely to answer the call of the wild). The Merino Wool Ninja Suit is the absolute cream of the crop, so go for that if you have the funds. Another note, this does run a bit large, and its 4-way stretch fabric, so I recommend sizing down a full size if you want it snug. I'm 5'8 170, and I wear a Medium which fits me well without being too tight.