I have a pair of the new 2FO flats (1.0, not the 2.0) very light and breath very well. Not as stiff on the foot as 5.10s but so far so good. I have had pretty good experiences with the big Red S and clothing/shoes so I'm interested to see how they hold up. I've had them for a month and a half, not nearly long enough, but so far so good.
neoprene sleeve is nice for keeping the dirt out of them though.