This dress is made from 96.5% Rayon and 3.5% elastane.
Rayon is made from natural fibers with some chemicals added while polyester is made from petroleum products and a lot of chemicals added.
Polyester vs Rayon Thread
This comparison can get a little heated as both threads have their supporters and they will defend their choice vigorously. One difference that makes people choose rayon thread over polyester is the luster or shine the former thread has. Polyester doesn?t compare.
Polyester may come in more brilliant and vibrant colors than rayon thread can. But rayon thread, if it is like the fabric, is made to mimic silk so its beauty is often overshadowing the artificial look polyester brings to the competition.
Then polyester thread may be stronger than the rayon version but rayon thread accepts dyes better. Polyester threads usually do not change color providing you with a look issue you rather not have to deal with.
Finally, the rayon thread is softer than its polyester opponent. It just has that feel of the rayon fabric and provides less irritation at the tie-off spot as well as throughout the whole garment. That gentle touch is seen in how easy rayon thread is on embroidery equipment. Polyester just doesn?t match up here.