Just so you guys know, that Stoic Merino is the real deal. Wore it the other day in -6 F weather with full snowmaking under the goggles. My hair froze to my goggles, but they didn't fog. The only time to be careful is when sickpow said. Bending over to strap in can fog them sometimes.
Im all for having fun, showing your tits and getting fucked up on a river float but it can be done without being a pig.