Super 100s vs 120s vs 150s: What Wool Count Actually Tells You

The "Super" number on a wool suiting label (100s, 120s, 150s, and beyond) refers to yarn fineness — roughly, how many times one kilogram of that wool's fiber could theoretically be spun into a one-kilometer-long thread. Higher numbers mean finer fiber diameter, which generally means a softer hand and smoother drape — but it does not automatically mean better, more durable, or more appropriate for your climate and use case. For most suits worn regularly, Super 100s–130s offers the best balance of luxury feel and real-world resilience. Super 150s and above are about refinement and occasion, not everyday armor.

If you're sourcing cloth — whether for a client's wardrobe or your own — understanding this number properly will save you from an expensive mismatch between fabric and lifestyle.

What the "Super" Number Actually Measures

The Super count system traces back to the Bradford wool trade and its old worsted spinning counts. Today, "Super 100s" and beyond are governed loosely by the International Wool Textile Organisation (IWTO), and they correspond to average fiber diameter in microns:

• Super 100s — approx. 18.5 microns
• Super 120s — approx. 17.5 microns
• Super 150s — approx. 16.5 microns
• Super 180s+ — approx. 15.5 microns and finer

Each step up the Super scale means the sheep's fleece produced finer, more uniform fiber — typically from specific Merino bloodlines bred and raised for textile-grade wool, with the finest counts often sourced from select Australian and South African flocks.

Here's the part that gets lost in marketing copy: the Super number tells you about the diameter of the individual fiber, not the weight, weave, finishing, or durability of the finished cloth. Two Super 130s fabrics from different mills, with different twist, weave, and finishing, can perform completely differently on a tailor's table and on a wearer's back.

What Goes Up — and What Goes Down — as the Count Rises

What improves with a higher Super count:

• Hand-feel — softer, more luxurious to the touch
• Drape — finer fiber falls more fluidly, less stiffly
• Visual luster — finer yarns reflect light more evenly, giving that quiet sheen fine suiting is known for

What typically declines:

• Abrasion resistance — finer fibers are more delicate, more prone to shine and wear at friction points (elbows, seat, cuffs)
• Wrinkle recovery — finer cloth creases more readily and doesn't always bounce back as crisply
• Forgiveness in construction — finer cloth shows pressing mistakes, badly set seams, and poor canvas work far more than a robust 100s or 110s

This is why a seasoned tailor doesn't reach for Super 180s to cut a suit for someone who travels weekly and lives out of a garment bag. That cloth wants a slower life — boardroom to car to dinner, not three flights and a packed carry-on.

Super 100s vs 120s vs 150s — Head to Head

Why "Higher Is Better" Is the Wrong Mental Model

We get this question constantly from both first-time buyers and tailors sourcing for clients: "Should I just always go for the highest Super number I can afford?"

No — and here's the honest reason. A Super 150s suit worn three times a week by someone commuting on public transport in Hong Kong's humidity will likely show shine and wear faster than a well-constructed Super 110s in the same conditions. The finer the fiber, the more it rewards a controlled environment and careful wear, and the more it punishes friction, humidity swings, and inconsistent care.

For Hong Kong and similar humid, high-friction climates specifically, weight and weave matter as much as Super count. A high-twist Super 110s or 120s in a tropical-weight construction will often outperform a heavier, finer cloth in actual comfort and longevity.

Our standing advice, consultant to client:

• Daily-wear, travel-heavy wardrobe: Super 100s–120s
• The "elevated everyday" suit — client wants to feel the upgrade without sacrificing wearability: Super 120s–130s
• Special occasion, evening wear, or a wearer who genuinely babies their clothes: Super 150s and above
• Collectors and connoisseurs seeking the rarest hand-feel, accepting the trade-offs: Super 150s–180s+, ideally rotated sparingly

What This Means If You're Sourcing for Clients

If you're a tailor or designer reading this for sourcing decisions rather than personal purchase: ask your client about their actual week, not their aspirations. A client who travels four days out of five needs to be steered toward count and construction that will still look sharp eighteen months in — not just what feels most impressive draped over the cutting table on day one. Super count is a sourcing variable, not a status checkbox; the best fabric consultants use it as one input among weight, weave, and finishing, not the entire conversation.

Explore the Range

Every wool fabric in our Animal Fiber Collection is labeled with verified Super count, weight, and mill origin — no inflated numbers, no ambiguous "Super" claims without backing. Whether you're building a daily workhorse wardrobe or sourcing a single exceptional cloth for a client, browse by Super count, weight, and finish to find the right match for the wearer's actual life, not just the highest number on the label.

FAQ

Is Super 150s always better than Super 100s? No. Super 150s is finer and softer but generally less durable for frequent wear. "Better" depends entirely on intended use — occasion frequency, climate, and how the wearer treats their clothes.

What Super count is best for hot, humid climates like Hong Kong? Weight and weave often matter more than Super count alone. A well-constructed Super 110s–130s in a tropical or high-twist weave typically performs better day-to-day than a heavier high-Super cloth.

Does a higher Super number mean better quality wool? It means finer fiber diameter, sourced from specific fine-wool sheep breeds. It does not by itself indicate superior weaving, finishing, or overall garment quality — those depend on the mill and construction.

Can Super count be faked or exaggerated on fabric labels? Unfortunately, yes, in unregulated markets. There's no universal legal enforcement of the Super labeling system, which is why provenance and mill transparency matter as much as the number itself.

What's the most practical Super count for a first luxury suit purchase? Super 110s–130s is the sweet spot most consultants recommend — enough refinement to feel like an upgrade, without the fragility that makes a wearer afraid to actually wear the suit.