You're thinking Kurtis but you don't want goofy-looking?!?
Unless you're using a neck leash, hat with straps etc you're going to lose them. I don't believe anyone who claims their glasses float, and even if they do, they're impossible to spot.
I'm using Dirty Dogs at the moment and they're ok. I've also got 720-armor Sharks v1 which I use with one of those woo-woo powerband necklaces as a leash, but the brown lenses don't work well when the silt has been stirred up in the lake.
The previous pair I had were excellent, and "floated", but I couldn't find them after a wipeout so they're gone. Can't remember the brand name, but was an obscure one and I got them from the UK eBay. The best anti-fog I've used, except for the Sharks, but one $40 or so.