If it's warm, I wear my zip-off pants zipped off as shorts. If cooler, I'll leave them as pants. On top, if warm, I tend to wear a moisture wicking shirt(or no shirt if sun isn't an issue). If cooler, I wear a t-shirt and long sleeve over it, or something of that sort. That's also the same clothes I wear when mountain biking or road biking. I've never seen any reason to wear anything else.