I am absolutely in love with my Pearl Izumi tights. I can't find the exct name as I have them at home, but they are two different fabrics. The front it a windbreaker/waterproof fabric. Then the back is a lighter weight, regular tight fabric. They are wonderful!!!! Especially on longer rides where you want to block the wind and rain, but not sweat your butt off becuase you can still breath through the back.

Sorry I can't provide a link, but I got my last two pair from performance bike.

Roshelle from Milwaukee