Amazing "tech" fabrics have been invented for outdoor wear. They keep you dry but not sweaty, cool but not wet, warm but not itchy, even bugless. Whole Earth sells the best selection, including socks and caps in "Smartwool"-- real wool from real sheep but re-jiggered so it never gets scratchy. This is where you also can get Prana knickers in a blend of nylon and Spandex that's abrasion- and wrinkle-proof and also quick-drying. Mountain Hardware jackets here are made of "conduit silk" to let them breathe. Or you could go for a Marmot hoodie made of "microporous polyurethane impregnated with silicon dioxide particles." How about Ex Officio's "Buzz Off" line? The clothes themselves repel mosquitoes, ticks, ants, flies, chiggers, midges and charging rhinos, according to the label. Well, not the rhinos. We made that up. But it might work if you put the clothes on first and then run real fast.