Silk

 
The fiber used may be of any form obtainable that the applicant deems appropriate to obtain the specified results.  Include cultivated and/or tussah in combed, carded, and expanded prepartions.
Big difference of opinion between the judges on some of these skeins.  The biggest comment was that I washed my silk skeins in detergent (dawn dish soap)  instead of  true soap.  That's a no-no.