Super 120′s – What does it mean?
Posted in Suits on May 14th, 2011 by admin
The various grades of wool cloth used for suits are referred to as Super 100’s, Super 120’s, Super 150’s and so on. So what does this actually mean?
Originally designed to describe the fineness of wool fibers, the “Super XXX” is now used in the marketplace as a quality ranking. The presumption is that the higher the S-number, the better the wool. While this is generally the case, it is not always true.
The S-number arose from the worsted count system and dates back to the 18th century. The worsted count was the number of 560-yard lengths (or hanks) of worsted yarn that a pound of wool yields. The finer the wool, the more yarn and the higher the count.
Although it is no longer used to count the number of hanks, the S-number now refers to the fineness of the wool, which is measured in microns (one millionth of a meter). The “Super” was generally reserved for wools with a count of 100 or higher. The list below correlates the S-number to the diameter of the wool fiber.
- Super 200’s ~13.5 microns
- Super 190’s ~14.0 microns
- Super 180’s ~14.5 microns
- Super 170’s ~15.0 microns
- Super 160’s ~15.5 microns
- Super 150’s ~16.0 microns
- Super 140’s ~16.5 microns
- Super 130’s ~17.0 microns
- Super 120’s ~17.5 microns
- Super 110’s ~18.0 microns
- Super 100’s ~18.5 microns
The fineness of the wool is only one factor in determining the quality and performance of a wool product. Length, strength, color, and crimp are also important, with the first two particularly so. Length is critical because the longer the fiber, the stronger the yarn that can be spun from it. Strength is critical because the yarn must be twisted very tightly (hence the name high-twist fabric) to achieve a fine weave. The way in which the fabric is finished also plays an enormous role in the feel and look. And this can differ tremendously from mill to mill. A Super 110 from one mill can be a higher quality fabric and have a silkier hand than a Super 130 from another.
The higher the S-number, the finer the wool. And as with most things, the finer the wool, the more expensive it is. So does more expensive mean better? It depends.
Finer wools suffer from what makes them desirable – they are finer and thus more delicate. Delicate fibers woven closely together are silkier, but still more delicate, making them less able to withstand heavy and repeated wear. A Super 120 suit, properly rested is fine to be worn twice or three times a week, while a Super 150 would be better served being worn just once a week. Finer wools also wrinkle more easily and should not be dry-cleaned as often.
So what should you do? Again, it depends. If you are fortunate enough to own a collection of 10 or 20 suits, durability is not as much of a concern since you are wearing each suit only a couple of times a month at most. And with a collection this large, cost probably isn’t an issue either. So enjoy the luxury of the finer wools, Super 150’s and up, for all your suits. If you wear suits often and only have a few in the rotation, stick with Super 120’s for your workhorses and save the Super 150’s for more formal affairs where you can showcase the quality. Road warriors will want to stick with Super 120’s for their durability and better resistance to wrinkles; sturdier wools such as Gabardine are ideal.






