Super 100s Wool
The dependable workhorse of business suiting
Fabric Properties
Weight
Medium (9-11 oz)
Season
Spring, Autumn, Winter
Formality
Versatile
Durability
High
Wrinkle Resistance
High
Breathability
Medium
Price Range
Mid-Range
Super 100s wool is the foundation of modern business suiting. The "Super" number refers to the fineness of the wool fiber, measured in microns. Super 100s wool has a fiber diameter of approximately 18.5 microns, striking the ideal balance between softness and resilience that has made it the default choice for professional wardrobes worldwide.
Originating from merino sheep bred across Australia, New Zealand, and South Africa, Super 100s wool offers a hand that is smooth without being delicate. It drapes cleanly over the body, holds a crease through a full day at the office, and recovers well from the inevitable wrinkles of commuting and sitting. For tailors advising clients who need a suit that performs day in and day out, Super 100s is the recommendation that never disappoints.
Major mills like Vitale Barberis Canonico, Loro Piana, and Dormeuil all produce extensive Super 100s collections, making it one of the most accessible quality fabrics on the market. It is the fabric against which all other suiting wools are measured.
Understanding the Super Number System
The Super number system was standardized by the International Wool Textile Organisation (IWTO) to classify wool fiber fineness. Super 100s corresponds to a fiber diameter of approximately 18.5 microns. Each step up in the Super number (110s, 120s, 130s, etc.) represents finer fibers, which generally means a softer hand but reduced durability. Super 100s sits at the sweet spot where the fiber is refined enough to feel luxurious against the skin, yet robust enough to withstand years of regular wear. For context, human hair averages around 70 microns in diameter, making Super 100s roughly four times finer.
Why Tailors Recommend Super 100s
Professional tailors consistently recommend Super 100s wool for clients building their first quality suit or expanding a working wardrobe. The fabric is forgiving during construction, holding stitches well and responding predictably to pressing and shaping. It accepts canvas interlinings beautifully, allowing the chest piece to mold naturally to the wearer over time. The yarn count allows for a tight, even weave that resists pilling and surface abrasion, meaning the suit will look professional through hundreds of wearings. For tailoring businesses, Super 100s also offers the advantage of wide availability in virtually every color, pattern, and weight.
Color and Pattern Options
Super 100s wool is available in the full spectrum of suiting colors and patterns. Navy and charcoal plains remain the bestsellers, but the fiber takes dye exceptionally well, producing rich, saturated colors from midnight blue to burgundy. Classic patterns like pinstripes, chalk stripes, glen plaids, and herringbones are all widely available. The medium fiber diameter produces clean pattern definition without the fuzziness that can affect finer wools. Tailors appreciate that the color remains true even after dry cleaning, with minimal fading over the garment's lifetime.
Performance in Different Climates
Wool is naturally thermoregulating, and Super 100s is no exception. The fiber's crimped structure creates air pockets that insulate in cold weather while wicking moisture away from the body in warmth. In a standard 10-11 oz weight, Super 100s performs well from early autumn through spring in temperate climates. For year-round wear, tailors often recommend a lighter 8-9 oz version for summer months, though clients in very hot climates may prefer a dedicated tropical fabric. The fabric resists odor naturally thanks to wool's antimicrobial properties, making it a practical choice for professionals who wear suits daily.
Longevity and Value
A well-made Super 100s suit represents one of the best value propositions in menswear. With proper care, including regular rotation (allowing 24-48 hours between wearings for the fibers to recover), professional dry cleaning every 6-8 wears, and proper hanging on shaped hangers, a Super 100s suit can easily last 5-10 years of regular wear. The cost per wear often drops below $1, making it more economical than cheaper suits that need replacing every year or two. For tailors, this longevity translates to satisfied clients who return for additional pieces.
Styling Guidance
Best For
- Everyday business suits
- First quality suit purchase
- Professional wardrobes
- Travel suits
- Year-round wear in temperate climates
Pairs With
- Cotton dress shirts
- Silk neckties
- Leather oxford shoes
- Wool overcoats
- Silk pocket squares
Avoid For
- Black-tie events (consider finer grades or mohair)
- Extreme heat (consider linen or fresco)
- Ultra-casual settings (consider cotton or hopsack)
Care Instructions
- Dry clean every 6-8 wears or as needed
- Hang on shaped wooden or padded hangers
- Allow 24-48 hours between wearings for fiber recovery
- Brush with a natural bristle clothes brush after each wear
- Steam wrinkles rather than pressing directly with an iron
- Store in a breathable garment bag during off-season
Pro Tip
When showing Super 100s to a client, emphasize the cost-per-wear calculation. A $1,200 Super 100s suit worn twice a week for five years costs about $2.30 per wear. A $300 polyester suit that lasts one year at the same frequency costs $2.88 per wear and never looks as good.
Visualize Super 100s Wool with Sartorly
Sartorly's AI captures the clean, professional drape of Super 100s wool with precision. The fabric's even surface texture and subtle sheen translate beautifully in AI-generated lookbooks, allowing your clients to see exactly how a navy or charcoal Super 100s suit will look on them before a single stitch is sewn.
Super 100s Wool FAQ
The difference is fiber fineness. Super 100s has fibers around 18.5 microns in diameter, while Super 120s is finer at about 17.5 microns. Super 120s feels softer and has a more refined drape, but Super 100s is more durable and wrinkle-resistant. For an everyday business suit, Super 100s is often the better choice. For special occasions or clients who prioritize a luxurious hand, Super 120s is worth the upgrade.
In most temperate climates, yes. An 8-9 oz Super 100s works for spring and early summer, while a 10-11 oz weight handles autumn and winter. In very hot or very cold climates, you may want a dedicated summer fabric (like fresco or linen) or a heavier winter option (like flannel). The key is choosing the right weight for your climate.
Reputable mills mark their fabrics with the Super number on the selvedge (the finished edge of the bolt). Look for IWTO certification, which guarantees the fiber fineness meets the stated standard. Be cautious of fabrics labeled "100s quality" or similar vague terms, as these may not meet the actual standard. Your fabric supplier or mill representative can provide certification details.