Good job. This is my third summer riding in the heat, and I've switched to long sleeve wicking poly shirts. I buy ANSI lime ones from alertshirt.com. They're cool and they keep the sun off my arms. I don't think there's much difference between this and bare arms as far as cooling, but I don't wind up with burned arms. I guess I'm at the age where I'm really starting to think I want to minimize my sun exposure so I don't wind up with associated health issues in 20 years.