We just successfully cleaned this rug which is 60% wool and 40% sisal.
Sisal is a natural fiber derived from the Agave plant which is native to Southern Mexico but is now cultivated in many other countries. I would not recommend buying a Rug with Sisal content. If the rug is steam cleaned it can end up buckling and will look like a big potato chip when it is dry. This one was not badly soiled and we were able to clean it with cold water and a low moisture cleaning method, and it worked, but we generally avoid cleaning these rugs. Certain natural fibers like Sisal, Jute, and Sea Grass shrink when they are exposed to water so most rug cleaners refuse to even attempt cleaning them because of the shrinkage/buckling issues. They have a nice earthy look, but please know when you are purchasing a rug with these fibers that you are probably buying a disposable rug that cannot be cleaned. Also avoid “Viscose”. These are inexpensive “faux silk” rugs that look really nice for awhile but are difficult to clean and may be throwaways after two or three years.