As you must know by now, wool resists odor. That is a good feature in a sock. They also wick and insulate better than cotton or all synthetic, so you can wear them comfortably in a pretty wide range of climates. Surly socks are made by DeFeet. They are Merino wool, with a small percentage of synthetic for increased durability. Each design comes in four sizes so pretty much everyone should find one that fits.