A light weight, but exceptionally strong, silky rayon thread. It is colorfast, both wash-able and dry cleanable. It is recommended that no bleach or whitening agents be used when laundering. While it is a weight that works very well in all decorative applications, it is the preferred thread for ‘free-motion’ machine embroidery as well as computerized embroidery. A size 12/80 machine needle is most commonly used with 40 wt. Rayon, unless the thickness of the fabric/stabilizer calls for a 14/90. It can also be used in the bobbin when working on projects where having the same color bobbin thread as top thread is important.