Saye
Saye is a woollen cloth woven in the west and south of England in and around the 15th and 16th centuries. A suburb of Bristol, England is called Sea Mills, this was originally Saye Mills.
Samuel Pepys on June 21, 1661, recorded purchasing "green Say... for curtains in my parler".
A related sort of cloth was serica, which was finer, since it also contained silk.