Clean Cotton 100% reclaimed fibers - Good for you and the environment! Universal Yarn took fibers leftover from making other yarns, the soft too-light fluff, the bits that otherwise would have been lost to the waste stream. Made this handy, durable, and surprisingly soft high-quality yarn. This 85% recycled cotton/15% recycled polyester blend "clean cotton" because it's a yarn you can feel good about using.