Yeah, the breathables are pretty cool -- especially on hot summer days! I have some Hodgman waist-hi's that I ordered off the internet for, like, $89 (plus $6 shipping). They're so much more comfortable on hot days. I really used to sweat in my neoprenes, but these waist-hi's are much better for keeping cool. I usually wear a pair of gym socks under the stocking-feet of the waders, since there seems to be a slight bit of moisture coming through, but the socks wick that up pretty well.

In the winter months, I'm sure I'll be able to 'layer up' underneath to stay warmer.

J-Bob say, "Go breathable -- yeah!"