Wool Knitwear -- Every Type of Wool, Explained
Wool is the backbone of good knitwear -- warm, breathable, resilient and naturally odour-resistant. But "wool" covers a huge range, from feather-fine merino to rugged Shetland, and the type decides how a jumper feels, how warm it is and how you care for it. This hub walks through every wool you are likely to meet, from the everyday workhorses to the luxury fibres, and links through to the deeper wool fabric hub and the flagship knitwear types guide.
The Main Wools
Merino Wool
The fine, soft, year-round wool that started the modern knitwear boom.
What it is
Merino comes from Merino sheep and is prized for its fineness -- the thin fibres feel soft against the skin and have none of the itch of coarser wool. It is light, breathable and temperature-regulating, working in both cool and mild weather. See the merino glossary for the full detail.
Why it matters
Fine merino is the ideal layering knit -- thin enough to wear under a jacket, warm enough to wear alone, and soft enough for sensitive skin. The what is merino wool guide explains grades and micron counts.
Lambswool
The soft, lofty wool from a lamb's first shearing.
What it is
Lambswool is the wool from a lamb's first shearing -- softer, finer and springier than later fleece. It traps air well, giving warmth and a gentle loft, and is a classic choice for crew necks and roll-necks. See the lambswool glossary.
Why it matters
Lambswool offers more warmth and softness than ordinary wool at a sensible price, making it the sweet spot for everyday winter knitwear -- cosier than fine merino but still refined.
Shetland Wool
Rugged, hard-wearing wool with a rustic, traditional character.
What it is
Shetland wool comes from Shetland sheep and is coarser, denser and loftier than merino or lambswool. It has a slightly rustic handle and is built for warmth and durability rather than next-to-skin softness, ideal for chunky, traditional knits.
Why it matters
Shetland is the choice for a hard-wearing, characterful winter jumper with real heritage. It is warmer and tougher than fine wools, perfect as a standalone top layer on cold days.
Luxury & Speciality Wools
Geelong Wool
An ultra-fine, premium grade of lambswool.
What it is
Geelong wool is a superfine grade of lambswool, originally associated with the Geelong region of Australia. It is exceptionally soft and light -- approaching cashmere in handle -- and is used by premium knitwear houses. See the Geelong wool glossary.
Why it matters
Geelong delivers luxury softness at a more accessible price than cashmere. It is a hallmark of fine Italian knitwear -- the Gran Sasso knitwear guide explains how it is used.
Extra-Fine & Superfine Merino
The finest grades of merino for the smoothest knits.
What it is
Extra-fine and superfine merino are the lowest-micron grades of merino wool -- the thinner the fibre, the softer and smoother the knit. These grades give a sleek, lightweight jumper with a clean surface and minimal itch, often used for fine-gauge layering pieces.
Why it matters
If you want the refinement of fine knitwear in wool rather than cotton or cashmere, superfine merino is the answer -- luxurious next to the skin and ideal under tailoring.
Wool Blends
Wool mixed with cashmere, silk, nylon or cotton.
What it is
Many knits blend wool with other fibres -- cashmere for softness, silk for sheen and drape, nylon for durability, or cotton for a cooler, year-round feel. A good blend balances the strengths of each fibre while controlling cost and care.
Why it matters
Blends let a jumper be greater than the sum of its parts -- a wool-cashmere mix is softer than pure wool but tougher than pure cashmere. Check the composition label to know what you are getting.
Wool in Practice
Wool, Warmth & Gauge
Why two wool jumpers can feel completely different.
What it means
Warmth depends on the wool type, how thickly it is spun and how it is knitted. A chunky, low-gauge Shetland traps far more air than a fine, high-gauge merino, so it is much warmer. Loft -- the air held in the fibres -- matters as much as the fibre itself.
Why it matters
Knowing this lets you pick the right jumper for the job -- fine merino to layer, chunky lambswool or Shetland to brave the cold. The gauge and construction hub goes deeper.
Spotting Quality Wool
The signals that separate good wool knits from poor ones.
What to look for
Look for the fibre type and grade on the label, a two-ply yarn, a dense even knit and a soft but springy handle. The Woolmark certifies genuine quality wool. Cheap wool knits feel thin, scratchy and prone to pilling.
Why it matters
Quality wool keeps its shape, resists bobbling and lasts for years. The quality hub gives the full checklist for judging a knit before you buy.
Caring for Wool Knitwear
Keeping wool soft, sized and moth-free.
What to do
Wash wool gently in cool water on a wool cycle or by hand, never wring or tumble dry, and dry it flat in shape. Fold rather than hang it, and store it clean to deter moths. Most modern wool is machine-washable on the right setting -- always check the label.
Why it matters
Heat and agitation felt and shrink wool permanently. Correct care keeps it soft and in shape for many winters. The care hub and de-pilling guide cover it in full.
Frequently asked questions
What is the best type of wool for knitwear?
It depends on what you want. For softness and year-round versatility, fine merino is hard to beat -- light, breathable and non-itchy. For warmth and cosiness at a sensible price, lambswool is the sweet spot. For a rugged, traditional winter jumper, Shetland is warmest and toughest. And for near-cashmere luxury, superfine Geelong wool is exceptional. There is no single best wool -- only the best wool for the weight, warmth and feel you are after.
Is merino wool itchy?
Good-quality merino should not be itchy. Itch comes from thick, coarse fibres pressing on the skin, and merino is prized precisely because its fibres are very fine -- fine enough to bend rather than prickle. Extra-fine and superfine merino grades are softer still and sit comfortably against sensitive skin. If a merino jumper feels scratchy, it is usually a coarser or lower grade, or a blend with rougher fibres.
What is the difference between lambswool and merino?
Both are soft wools, but they differ in source and character. Merino comes from Merino sheep and is exceptionally fine, smooth and lightweight, ideal for sleek layering knits. Lambswool is the wool from any breed's first shearing, slightly thicker and loftier, giving a springy, cosy warmth. Merino feels finer and more refined; lambswool feels warmer and more substantial. Both are excellent -- the choice is about weight and feel.
Is wool knitwear warm enough for winter?
Yes -- wool is one of the warmest natural fibres, and it insulates even when slightly damp, unlike cotton. For deep winter, choose a chunky, low-gauge knit in lambswool or Shetland, which traps more air and holds more warmth. A fine merino layer is lighter and better suited to milder days or for wearing under a coat. Match the weight and gauge of the wool to how cold it is and how you will wear it.
How do I stop wool knitwear from shrinking?
Wool shrinks and felts when exposed to heat, agitation and sudden temperature changes. To prevent it, wash wool in cool water on a gentle or dedicated wool cycle, or by hand, using a wool-safe detergent. Never tumble dry it, never wring it, and dry it flat in shape rather than hanging. Always follow the care label, and when in doubt, hand wash -- it is the safest way to keep a wool jumper its original size.