RailRiders makes an AWESOME shirt, and they’re pretty popular on the PCT. They are nylon so it dries very quickly, has a nice soft feel to it, does NOT retain odor, and it’s super ventilated, with mesh up the sides and the under the whole length of the arms, as well as a back vent.
If ours hadn’t gotten so dirty looking (our packs leached color), they would most certainly make it through another thruhike. They are extremely tough. We wore them every single hiking day. There are a couple versions. We used the Eco-Mesh, but next time we’ll buy the Adventure Top. White is best, but they have a light beige and pale blue, too.
Sunday Afternoons Hats are great. They are long in back and can cover your neck.
We both wore light-colored pants on the whole hike (Jeff wore Ex Officio, and I wore OR/Wild Roses). On the AT we both wore shorts. I know it sounds odd, but we were actually much cooler in the desert wearing the pants and long sleeves! We both noticed that on our PCT off-trail days we felt much hotter in shorts and tees. Odd but real. The light-colored cloth reflects heat.
I hate to be a wet blanket, but the UV exposure out west is much higher than in the east, and shade is hard to find, even for your breaks. You’ll be hiking in direct sun most of the time. On a shorter hike (like the JMT) it’s not as big a deal, but five solid months of strong sun exposure may come back to bite you in the butt 10 or 20 years from now. A hiker tan is nice, but skin cancer on the legs is both ugly and common. You won’t be aware of the damage for many, many years, and your don’t have to burn to get into problems. At the very least, you should consider this when you’re choosing your hiking clothes.
Happy hiking!
Chipper & Jeff