Socks are thick, soft and warm, but they have no wool content at all. You can check by pulling off just a few fibers and light with lighter. If there is wool, you will smell burning hair, and the ash will be soft and compressible. If the fibers are all synthetic, they will roll up into a hard ball of burned plastic, no burned hair smell. These socks are made of synthetic material and should not claim wool content. They look like a pretty good synthetic sock though, and the price is right, just not made of wool.