Silk collar linings Dark navy is plain. Others have cute small floral patterns. Set of 4. Unused, new, but has been stored at home for a long time, so I've marked it as "Like new." I've listed them as silk, but I have no way to prove it. I have been a Japanese dressmaker for 50 years and a kimono dressing instructor for over 10 years, and I am still working. I am listing them as silk based on my own judgment. Thank you for looking.