The UV dye in Alert Shirts holds up pretty good through multiple washes.

However, they don't breathe well at all IMO. I clipped the cuffs off my long sleeves in an effort to get air up the arms, and vent shirt better.

I chose long sleeves for UV protection - shirts are cheaper than sunblock. I wear LS shirts year round, even when it's 100F. In fact, I add a short sleeve on top of the long sleeve for additional UV protection of my back when it's really hot.

IIRC I bought some of these: http://alertshirt.com/poloslmtanco.html