Fabrics & Craftsmanship
What is Super 100s, 120s and 150s wool?
- Written by
- The Roomten tailors
- Published
- 2026-09-05
- Last reviewed
- 2026-09-05
- Reading time
- 5 min
- Super 120s
- Super 100s wool
- Super 150s
- wool grades
In short
Super numbers describe the fineness of the wool fibre: Super 100s is fine and hard-wearing, Super 120s is softer and lighter, and Super 150s is very fine and luxurious but less durable. For most men, Super 100s–120s is the best balance of looks and longevity.
The 'Super' system measures how fine the individual wool fibres are. The higher the number, the finer the yarn and usually the lighter and softer the cloth. It is a useful guide, but it is not the only measure of quality.
What the numbers mean
- Super 100s — durable, good drape, ideal for everyday business suits.
- Super 120s — lighter, softer and more supple; a strong choice for multi-purpose suits.
- Super 150s and above — very fine, silky and luxurious, but more delicate and prone to shine.
Is higher always better?
Not necessarily. A high Super number feels wonderful but can wear out faster if worn daily. A lower Super number in a tightly woven worsted will often outlast a very fine cloth. We usually recommend Super 100s–120s for a first commission.
How the weave matters
A plain weave in Super 120s is more practical than a loose weave in Super 150s. Twill, hopsack and high-twist weaves all affect how the cloth behaves, sometimes more than the Super number itself.