Thanks I think... on the sweat issue, the Volt is a nice helmet, fits well, but is basically smooth around the front, whereas the Giro's have channels. That is about all I could figure. I've worn white, red, blue, silver, and black helmets, as far as I could tell color had very little to do with feeling hot or cooler. I do where a headband (highly recommend), it might be the the way the Volt fits my head, but I didn't have the problem with my Pneumo or Atmos. I think I'm going with the white/silver Ionos, so I'll see which glasses look better with it...

Thanks again