I love this tank so much I bought a 2nd!!!!
sorry that the guy below me so was so bummed with his purchase. It does say it is "performance". nowhere does it say "lightweight" or anything like that. In the tech specs it says its 100% poly mesh, obviously not a lightweight material.... besides the point....
It is super breathable (not perforated) and is a perfect base layer stacked with a smarty jacket or something like that. I rock this tank almost every day during the summer.