Types of Wool Explained: Cashmere, Merino, Alpaca & More

May 11, 2026

Not all wool is the same material. Merino, cashmere, alpaca, mohair, Shetland, each comes from a different animal, has different fiber characteristics, and performs differently depending on how it's made and worn. Understanding these differences changes how you shop and what you get for your money.

This guide covers the most important wool types, how they're constructed into fabric, and what each one is genuinely best suited for.

The Basics: Knit vs. Woven Wool

Before getting into fiber types, it helps to understand how wool is turned into fabric, because the same fiber behaves completely differently depending on construction.

Knitted wool is made from interlocking loops of yarn. The structure has natural elasticity and stretch, which is why knitwear moves with the body and recovers its shape. Most sweaters, cardigans, and scarves are knitted. Within knitwear, gauge matters: fine-gauge knits use thinner yarn with more stitches per inch and produce a refined, smooth surface; chunky or loose-gauge knits use heavier yarn and produce a textured, more casual finish.

Woven wool is made by interlacing warp and weft threads on a loom. The result is a structured, stable fabric that holds its shape without stretch. This is what tailored coats, suits, trousers, and blazers are made from. Woven wool is also where weave patterns come in, twill, herringbone, plain weave, and hopsack all have different surface textures and durability profiles.

Within woven wool, the most common constructions are:

Plain weave — each thread passes over and under alternately. Simple, balanced, durable. Common in everyday tailoring fabrics.
Twill weave — threads pass over two or more before going under, creating a diagonal rib. Very durable, drapes well. Used in trousers, overcoats, flannel.
Herringbone — a variation of twill that reverses direction at intervals, creating a V-shaped zigzag pattern. Strong and visually distinctive. Common in sport coats and heritage tailoring.
Hopsack — a loose, open weave with a slightly rough texture. Breathable and casual, popular for summer suiting.

The fiber type and the construction work together. Cashmere in a fine-gauge knit behaves completely differently from cashmere woven into a coating fabric. Knowing both dimensions gives you the full picture.

The Wool Types

Merino

Merino comes from Merino sheep, originally from Spain, now bred primarily in Australia and New Zealand. The fiber is significantly finer than standard sheep wool (typically 15 to 24 microns in diameter) which is what makes it soft enough to wear directly against skin without irritation.

It's breathable, moisture-wicking, and temperature-regulating in a way that synthetic fibers can't replicate. Merino absorbs moisture vapor before it becomes liquid sweat, which keeps you comfortable across a wider temperature range than most materials.

Best for: base layers, lightweight knitwear, travel pieces, everyday sweaters. Merino works well in fine-gauge knits and as woven fabric for lightweight suiting in warmer climates.

Worth knowing: fiber diameter matters more than the word "merino" on the label. Superfine merino (under 18.5 microns) is noticeably softer than standard merino (22–24 microns). Some brands use "merino" loosely, look for micron counts when possible.

Cashmere

Cashmere comes from the soft undercoat of cashmere goats, combed (not sheared) once a year. Mongolia, China, and parts of Central Asia are the main producers. The fiber is exceptionally fine (typically 14 to 19 microns) with a natural softness that comes from the fiber's structure, not processing.

Because each goat produces only around 150 grams of usable fiber per year, supply is genuinely limited, which is part of why quality cashmere commands high prices. Cheap cashmere exists, but it uses shorter fibers that pill quickly and lose their softness fast.

Best for: luxury knitwear, scarves, lightweight coats. In fine-gauge knits it's unmatched for softness and drape. In woven form it produces coating fabrics with a beautiful matte finish.

Worth knowing: ply and fiber length determine longevity. Two-ply cashmere (two strands twisted together) is more durable than single-ply. Longer fibers pill less. If a cashmere piece feels immediately soft and very lightweight, it may be using short, low-quality fiber, quality cashmere feels refined but has some substance to it.

Lambswool

Lambswool is wool taken from a sheep's first shearing, typically when the animal is around seven months old. The fiber tips have never been cut before, which gives them a naturally tapered, softer end compared to wool from subsequent shearings.

It's warmer and fuller than merino, with a slightly textured, rustic hand feel. Less refined than cashmere, but more durable and with more character.

Best for: traditional winter knitwear, chunky sweaters, cold-weather layering. Works well in medium to heavy gauge knits.

Worth knowing: lambswool is not the same as "lamb's wool" used generically. True lambswool comes from a first shearing. It's a step below cashmere in softness but considerably more robust.

Alpaca

Alpaca fiber comes from alpacas, which are native to the Andes and bred primarily in Peru. The fiber is naturally hollow, which gives it an excellent warmth-to-weight ratio, warm without heaviness. It contains less lanolin than sheep wool, making it less likely to cause irritation for people sensitive to standard wool.

The texture is silky and smooth with a subtle natural sheen. Alpaca doesn't felt as easily as sheep wool when wet, and it has natural water resistance from the fiber's structure.

Best for: coats, scarves, statement knitwear, cold-weather layers where you want warmth without bulk. Alpaca works in both knitted and woven constructions, and in woven overcoating fabrics it produces a luxurious, fluid drape.

Worth knowing: there are two types. Huacaya alpaca (the most common) has a fluffy, crimped fiber and produces softer, lighter fabric. Suri alpaca has a longer, silkier fiber with more natural luster and drape, and is rarer and typically more expensive.

Mohair

Mohair comes from Angora goats, not to be confused with Angora rabbits, which produce a different fiber entirely. The main producing regions are South Africa, the United States, and Turkey. Mohair fiber is long, strong, and has a natural luster that gives finished fabric a distinctive sheen.

When knitted loosely, mohair produces an airy, halo-like surface that is visually distinctive and adds significant warmth for its weight. It's one of the strongest natural fibers, which means it resists wear well despite its light appearance.

Best for: textured knitwear, fashion-oriented sweaters, and as a blend component in tailoring fabrics. Mohair-wool blends in woven suiting add durability, a slight sheen, and crease recovery.

Worth knowing: the halo effect (those fine fibers that extend from the surface) can shed, especially in cheaper mohair. Kid mohair (from young goats, first or second shearing) is finer and softer than adult mohair and is the grade used in luxury knitwear.

Camel Wool

Camel fiber comes from the soft undercoat of Bactrian camels, collected during their spring molting season. The natural color ranges from cream to medium tan to rich brown, tones that require no dyeing, which is part of why natural camel fabric has such a distinctive warmth in appearance.

The fiber is lightweight and insulating with a dry, smooth hand feel. In woven form it produces an elegant, slightly matte coating fabric with excellent structure and drape.

Best for: overcoats, scarves, luxury tailoring. The natural tones make it particularly suited to pieces worn in their undyed state. Woven camel coating is one of the most sophisticated coat fabrics available.

Worth knowing: "camel coat" in fashion often refers to the color, not the fiber, many camel-colored coats are made from wool or synthetic blends. True camel fiber is a different material with a distinct texture. Read the fiber content.

Shetland Wool

Shetland wool comes from Shetland sheep, a hardy breed native to the Shetland Islands off northern Scotland. The sheep live in a demanding climate, and their wool reflects it, dense, durable, and highly insulating, with a characteristic dry, slightly textured hand feel.

It doesn't have the softness of merino or cashmere, and it's not trying to. Shetland has a distinctly rustic quality (the slight roughness, the textural variation, the natural heather tones) that is part of its appeal rather than a deficiency.

Best for: heritage knitwear, Fair Isle patterns, chunky sweaters, cold-weather garments where durability and character matter. Shetland is not a good choice for people sensitive to fiber texture, but for traditional knitwear it's exceptional.

Worth knowing: genuine Shetland wool is produced from Shetland sheep. Some brands use the name loosely to describe a style of knitwear. The Shetland Wool Week and associated producers are a reliable reference for authentic material.

Boiled Wool

Boiled wool isn't a different animal fiber, it's a manufacturing process applied to wool fabric. Wool is washed at high temperatures and agitated, causing the fibers to felt and compress into a dense, thick fabric that no longer resembles a woven or knitted structure.

The result is wind-resistant, warm, and dimensionally stable. It doesn't fray when cut, which is why it's often used in structured pieces without visible seams or hems.

Best for: structured jackets, outerwear, minimalist coats. Boiled wool produces an architectural quality that works well in clean-cut designs. It's particularly associated with Austrian and German outerwear traditions.

Worth knowing: boiled wool does not breathe as well as regular wool because the felting process closes the fiber structure. It's warm but not ideal for high-activity wear.

Virgin Wool

Virgin wool simply means wool that has never been processed before, it hasn't been recycled from old wool garments or blended with reclaimed fiber. The term says nothing about fiber quality, softness, or origin.

Virgin wool can be coarse or fine, from premium or standard sheep breeds. What it guarantees is that the fiber hasn't been through a previous lifecycle, which generally means better fiber integrity, elasticity, and durability compared to recycled alternatives.

Best for: tailoring, coats, structured knitwear, any application where fiber integrity matters for longevity and performance.

Worth knowing: "virgin wool" on a label is not a quality claim beyond fiber origin. A virgin wool garment can still be scratchy, poorly constructed, or made from low-grade fiber. Look at breed, micron count, and construction alongside the virgin wool designation.

Blends: When They Make Sense

Not every blend is a cost-cutting measure, some genuinely improve performance.

Wool-cashmere (typically 90/10 or 85/15) adds softness and a refined hand feel while keeping costs lower than pure cashmere. The wool content also improves durability and reduces pilling. A well-executed wool-cashmere blend often outperforms cheap pure cashmere.

Wool-silk adds natural luster, improves drape, and lightens the fabric. Common in woven suiting fabrics where a subtle sheen is desirable.

Wool-alpaca combines the structure of wool with alpaca's warmth and silky texture. Used in both knitwear and coating fabrics.

Mohair-wool (in woven tailoring) adds durability, crease resistance, and sheen to suiting fabric. Traditionally used in summer-weight suits for the way it resists wrinkling.

Wool-polyamide (nylon) is primarily a durability measure, often used in socks and high-wear areas of knitwear. Reduces the cost of pure wool but doesn't add anything in terms of feel or breathability.

Wool-polyester is generally a compromise, it reduces cost and wrinkling, but at the expense of wool's natural properties. Avoid it in knitwear and tailoring unless the price point makes it unavoidable.

Choosing by Priority

Softness against skin: cashmere, superfine merino, alpaca.

Warmth without weight: alpaca, cashmere, camel wool.

Structure and tailoring: virgin wool, boiled wool, camel coating, wool-mohair blends.

Durability and longevity: Shetland, virgin wool, lambswool, mohair blends.

Breathability and temperature regulation: merino (especially in base layers and fine-gauge knits).

Heritage and character: Shetland, lambswool, herringbone or twill wovens.

Lightweight luxury: cashmere, superfine merino, camel wool.

The Practical Bottom Line

"Wool" on a label tells you almost nothing by itself. What matters is which animal, which part of the animal, how fine the fiber is, whether it's knitted or woven, and how that construction serves the garment's purpose.

A Shetland sweater is supposed to feel textured and robust, that's not poor quality, that's the right material doing what it's meant to do. A fine-gauge cashmere sweater is supposed to feel light and refined. A boiled wool jacket is supposed to feel dense and structured. Comparing them against each other misses the point.

Know what the garment is for, match the fiber and construction to that purpose, and you'll buy fewer things that disappoint.