Super S
The S number often is used in conjunction with the word "super" which originally meant the best wool, (called choice wool in the United States) As now used Super means pure new wool and can also be used for fabrics made from wool blended with rare fiber (such as mohair, cashmere wool and alpaca), and also with silk. The inclusion of Elastane to give the fabric a stretch effect is permitted, as also is the inclusion of up to 5% non-wool yarn for decorative effects. For wool blend fabric descriptions, the word Super is not permitted. Subject to the wool content being at least 45%, the S number may be used.
Read more about this topic: S Number (wool)