Myth busting – The truth about the ‘Super’ number
The ‘Super’ rating on cloth refers to the width of the fibre in microns. It is therefore an indicator (but by no means a measure) of quality and performance. The finer the wool is spun the thinner it is in microns and the higher the Super number – indicating that it will feel very soft. However, the high number also indicates that the cloth will be more delicate and therefore require more care be taken when wearing.
Beware – a Super number is not directly related to value. For example, a blend of wool and polyester could have a high S number – and still be a low quality cloth!
Most King & Allen clients opt for a Super 100 or Super 120 pure wool worsted (around 18 microns wide) – which offers the balance of comfort, durability and value for money.
Where does the S Number originate from?
Traditionally wool length is measured in yards. The S number is the amount of 560 yard (512m) lengths (traditionally known as ‘hanks’) that 1 pound (0.45kg) of wool will produce.
A fibre that yields 100 hanks has an S number of 100.