I bought the Serengeti's and flew with them this weekend in a hot and hazy Philippines.
They were fantastic...comfortable...I can honestly say I didn't notice I had them on. The optics are exceptionally clear as well.
I bought the Nuvola which are exceptionally light and frame less.
I'm a happy chappy.
Best,
Sicknote
PS. Here's the link.
http://www.serengeti-eyewear.com/