I work in the woods every day I can. Wool is the only thing I've found durable enough to last. In the winter I layer a wool shirt over a Duofold inner layer (the label says 50% cotton, 40% wool and 10% nylon). I use a heavier wool shirt as an outer layer. I purchased a Woolrich shirt made out of their "wooldura" material. <br><br>I wear pretty serious rain gear much of the time since I work in Western Washington. If I get too wet I just wring out the bulk of the water (mainly from the sleeves - they act like a wick) and I'm a happy camper. I'm a big guy (6'3" and 200 ++ pounds) so I don't really notice the extra weight. A wool stocking cap is absolutely essential for me also (since my hairline is creeping down now as well as up).<br><br>I am experimenting with a set of that really lighweight synthetic longjohns and shirt (the stuff I bought is 100% polyester). It rolls up small enough to throw into a corner of my day pack to put on while my other clothes are drying by the fire after I fall off that log into the creek. I think they might find a home in a larger PSK.