Wore this on a humid travel day and it stayed dry through two flights. The perforations really do let air through, and it packs down to nothing in a carry-on.
James★★★★☆
The perforations actually do something — I ran warm errands all afternoon and didn't get that sticky back feeling. Only thing is the fabric wrinkles easily if you don't hang it right away.
Joshua E.★★★☆☆
The sweat-wicking fabric is a nice touch for hot commutes, but the fit runs slimmer than I expected through the chest. It's fine for casual wear, just not as roomy as I'd hoped.