The Super number is frequently mistaken for a measure of quality, yet it serves as a precise technical grading of the wool fibre itself.
To hold a length of Super 150s wool is to feel the result of two centuries of selective breeding and industrial refinement. While many perceive the number on a bunch of cloth as a simple hierarchy of merit, it is a specific unit of measurement derived from the diameter of individual wool fibres. Notably, a Super 100s wool fibre measures approximately 18.75 microns in diameter; for context, a human hair is roughly 75 microns. This means the wool used in a high-grade suit is four times finer than the hair on one's head, transforming raw fleece into a fabric with a remarkable handle.
The Bradford counting system
This nomenclature originated in the industrial heart of nineteenth-century Yorkshire. In the wool exchange of Bradford, merchants developed a system based on how many hanks of yarn—each 560 yards (512 metres) long—could be spun from one pound (0.45 kilograms) of clean, combed wool. A wool that could produce 80 hanks was graded as 80s. This standard remained until the mid-twentieth century, when technological advancements in spinning allowed for finer yields. In 1966, the Huddersfield mill Joseph Lumb & Sons, working with the Scottish weaver Reid & Taylor, produced a cloth so fine it surpassed existing scales. They branded it "Super 100s," establishing the terminology that defines the industry today.
Microns and the loom
The modern International Wool Textile Organisation has since codified these numbers to ensure transparency. The "Super" designation is now strictly tied to the maximum fibre diameter, measured in microns—a unit of one-thousandth of a millimetre (0.000039 inches). Super 100s must be 18.75 microns or finer; Super 120s must be 17.75 microns; and by the time one reaches Super 200s, the fibres are a mere 13.5 microns. As the number increases, the fibres become thinner, allowing more of them to be packed into a single yarn. The standard width for these cloths remains 150 centimetres (approximately 59 inches). This density creates a cloth with a pronounced natural lustre and a softer, more fluid drape.
Durability versus hand feel
These variations dictate the life of a garment. A Super 100s or 110s cloth possesses a robust resilience, with thicker fibres that resist breaking and hold a crease with stubbornness. These are the workhorses of the professional wardrobe. Conversely, as one moves into Super 150s and beyond, the cloth gains a buttery texture but loses structural integrity. These higher numbers are prone to premature wear at friction points such as the inner thigh or elbows. A Super 180s suit is an exercise in indulgence, suited for the occasional evening event rather than the daily rigours of a Melbourne commute. The choice is a balance between the tactile pleasure of the cloth and the intended frequency of use.
Navigating the Melbourne climate
For the man moving through the variable temperatures of Collins Street, a Super 120s or 130s provides the ideal equilibrium. This grade is fine enough to breathe during a humid afternoon yet carries sufficient body to withstand the damp chill of a Victorian winter. When judging a cloth, one should look for a "high-twist" construction in these Super ranges. By twisting the fine yarns more tightly before weaving, mills like Vitale Barberis Canonico or Loro Piana create fabrics that are both lightweight and remarkably crease-resistant. A man with a stronger frame may favour the slightly heavier drape of a Super 110s, which provides a cleaner line and obscures physical irregularities more effectively than a gossamer-thin Super 160s.
A shift in global demand
This record reflects global competition for the finest Australian Merino wool. In the 1980s, an arms race began between Italian and British mills to secure the finest bales. This era saw the Super number used as a status symbol, often at the expense of longevity. Recognised figures in business sought out the highest numbers as a mark of success, leading to fabrics that were almost too delicate to be sewn. Today, the conversation has matured. The contemporary gentleman recognises that a Super 150s from a reputable mill like Holland & Sherry is a technical marvel, but its value lies in its performance and drape rather than the label on the selvedge.
The practical application of fineness
Specifying a cloth begins with an honest assessment of one's lifestyle. A Yarra Valley wedding calls for the refined lustre of a Super 150s to match a partner’s silk gown and provide a commensurate level of formality. For the daily suit that must endure the repetitive motions of office work and travel, a Super 110s in a twill weave offers the most reliable service. When visiting a studio, the knowledgeable client looks past the label to feel the "spring" of the cloth—the way it bounces back after being squeezed in the palm. This tactile feedback informs a choice that is both technically sound and personally appropriate. The journey toward a finished garment starts with this appreciation for the raw material.