Rayon is a semi-natural fiber - it is essentially re-processed cotton. Our rayon braid has more sheen and the colors available are a more muted palette. Please note the entire line of BeadSmith Soutache was designed by a textile jewelry artist for textile jewelry artists so tremendous attention was paid to consistency of width, thickness and drape so that the rayon and polyester braid can be used together successfully. Measures 3mm wide and 1mm thick. Made in the USA. Qty: 1 yard.