What Is Cashmere? Quality Grades and How to Spot Fakes

You're in a store holding two sweaters. Both tags say "100% cashmere." One costs $250, the other $29.99. They can't possibly be the same thing, and honestly, they aren't. Understanding what is cashmere fabric, where it actually comes from, and why the price range is so absurd will save you from wasting money on something that pills into oblivion after three wears.

What Is Cashmere Fabric, Really?

Cashmere comes from the undercoat of Kashmir goats, primarily raised in Mongolia, China, Iran, and Afghanistan. These goats develop an incredibly fine, soft layer of insulating fiber beneath their coarser outer coat to survive winters that regularly hit -30°F. Each spring, herders comb or shear this undercoat by hand. A single goat produces roughly 4 to 6 ounces of usable cashmere per year. That's it. One sweater requires the annual output of about three to four goats.

This scarcity is the first thing to understand. Cotton grows in fields. Polyester comes from petrochemicals in factories. Cashmere comes from a limited number of goats living in harsh climates, collected once a year. The supply has a natural ceiling, which is why real, high-quality cashmere has never been and will never be cheap.

The fiber itself is what makes it special. Cashmere fibers measure between 14 and 19 microns in diameter, compared to roughly 25 to 40 microns for standard sheep's wool. That fineness is why cashmere feels so much softer against your skin. It's also why it insulates about three times better than wool by weight. You get warmth without bulk, softness without scratchiness.

Cashmere Quality Grades: Not All Cashmere Is Equal

Here's where things get interesting and where most shoppers get burned. Cashmere is graded based on fiber length, diameter, and uniformity. The grading system runs from A to C, and the differences are significant.

Grade A cashmere uses fibers that are at least 36mm long and under 15.5 microns in diameter. This is the good stuff. Long, fine, uniform fibers interlock tightly when spun into yarn, creating a fabric that resists pilling, holds its shape, and gets softer with age. Grade A cashmere is what your grandmother is talking about when she says her cashmere sweater lasted twenty years.

Grade B sits in the middle. Fibers run about 28 to 34mm long and 16 to 19 microns thick. It's still genuinely nice. You'll notice it's slightly less soft than Grade A, and it will pill more over time. Most reputable mid-range cashmere brands use Grade B fibers, and for plenty of people, it's the sweet spot between quality and price.

Grade C is where fast fashion lives. Fibers are shorter than 28mm, thicker than 19 microns, and often inconsistent in quality. Short fibers don't grip each other well in the yarn. They work loose, migrate to the surface, and tangle into pills. A Grade C cashmere sweater can start looking rough after just a handful of wears. It's technically cashmere, but the experience of wearing it barely resembles what cashmere is supposed to feel like.

When WearScore scans a care label and identifies cashmere, the grade makes all the difference in the fabric score. Grade A cashmere consistently earns an A rating. Budget cashmere from fast fashion lines typically lands around B- or C+, which reflects the reality that not all cashmere delivers the same value.

Why Cashmere Has Gotten Cheaper (and Worse)

Twenty years ago, cashmere was a luxury purchase. Full stop. You'd find it at department stores and specialty retailers, and you'd pay for it. Then fast fashion discovered that "cashmere" on a tag moves product, regardless of what's actually inside.

The demand explosion pushed Mongolian and Chinese herders to expand their flocks dramatically. Overgrazing followed. The grasslands that Kashmir goats depend on started degrading, which stressed the animals, which produced coarser, shorter fiber. At the same time, processing mills found ways to use shorter and shorter fibers, blending them into yarns that technically met the definition of cashmere but performed nothing like the traditional product.

China now produces roughly 70% of the world's raw cashmere. Much of it is processed quickly and cheaply, with less attention to sorting fiber by length and fineness. The result is a flood of cheap cashmere that has diluted the meaning of the word. When you see a $30 cashmere sweater at a fast fashion chain, you're looking at Grade C fiber, processed at volume, with thin construction that prioritizes cost over longevity.

It's not a scam exactly. The tag isn't lying when it says cashmere. But calling Grade C cashmere and Grade A cashmere the same thing is like calling a $5 wine and a $50 wine the same because they're both made from grapes.

How to Spot Fake Cashmere

Outright fake cashmere does exist, and it's more common than you'd hope. Some garments labeled as cashmere contain significant percentages of wool, viscose, or even acrylic. Others blend a small amount of cashmere with cheaper fibers without disclosing it accurately. Here's how to protect yourself.

Price is your first and most reliable indicator. If a cashmere sweater costs less than $100, be skeptical. If it's under $50, be very skeptical. The raw fiber alone for a quality cashmere sweater costs more than most fast fashion pieces retail for. No business model makes that math work unless the cashmere is Grade C, blended with other fibers, or not actually cashmere at all.

Touch the fabric with intention. Real cashmere feels soft but also has a subtle dryness to it. If a sweater feels slippery, overly silky, or plasticky, something else is going on. Synthetic fibers that imitate cashmere's softness almost always have a slick quality that genuine cashmere lacks.

Try the stretch test. Gently pull the fabric and release it. Real cashmere bounces back to its original shape. Fakes or heavily blended pieces tend to stay stretched or recover slowly. Cashmere fibers have natural elasticity from their crimped structure, and synthetics can't replicate that snap-back.

Check the weave density. Hold the garment up to a light source. Quality cashmere should be relatively opaque for its weight. If you can see light streaming through easily, the yarn is thin and the knit is loose, both signs of cheap construction even if the fiber is genuine.

Look at the label carefully. In the US, the Textile Fiber Products Identification Act requires accurate fiber content labeling. But enforcement is inconsistent, especially for imported garments. If a label says "cashmere blend" without specifying percentages, that's a red flag. Legitimate brands are transparent about their fiber content.

The Pilling Reality

Let's clear up a common misconception: cashmere pills. All cashmere pills. Even the expensive stuff. This surprises people who assume that pilling means they got ripped off. It doesn't necessarily mean that.

Pilling happens when loose fibers work their way to the surface of the fabric and tangle into small balls. Every natural fiber does this to some degree. With cashmere, it's particularly noticeable because the fibers are so fine and the fabric is often worn against other surfaces like coat linings and bag straps.

The difference between grades shows up in how much and how long a garment pills. Grade A cashmere with its longer fibers tends to pill mainly during the first few wears as the loosest surface fibers work free. After that initial period, it settles down and can go years without significant pilling. Grade C cashmere, with its shorter fibers, pills continuously because those short fibers never really lock into the yarn structure. They keep migrating to the surface indefinitely.

A cashmere comb or fabric shaver is a worthwhile investment regardless of what grade you own. Regular depilling keeps any cashmere garment looking fresh. But if you're using one every single time you wear a sweater, that's a sign your cashmere is on the lower end of the quality spectrum.

Cashmere vs Wool: When Wool Actually Wins

The assumption that cashmere is always better than wool isn't quite right. Merino wool, for instance, can be incredibly soft (fibers around 17 to 20 microns), durable, moisture-wicking, and significantly more affordable than cashmere. For active use, travel, or everyday layering, high-quality merino often outperforms cashmere.

Cashmere wins on softness, warmth-to-weight ratio, and the way it drapes. It's unmatched for pieces you want to feel luxurious against your skin. But it's more delicate, requires more careful washing, and costs more per wear unless you're buying quality pieces and maintaining them properly.

If your budget is $50 and you want a sweater that lasts, buy a great merino wool piece over cheap cashmere every time. You'll get better performance, less pilling, and a garment that actually holds up. Save the cashmere budget for when you can afford Grade A or at least a solid Grade B.

Is Cashmere Worth It?

That depends entirely on which cashmere you're buying. Grade A cashmere from a reputable brand, properly cared for, can last a decade or more. The cost per wear on a $300 sweater worn 100 times is $3. That's genuinely good value for a garment that feels incredible every time you put it on.

Grade C cashmere from a fast fashion brand for $30, worn maybe 15 times before it pills beyond recovery, costs $2 per wear. Barely cheaper, and the experience is worse in every measurable way.

The next time you're shopping and you see what is cashmere fabric on a label, don't stop at those two words. Ask which cashmere. Try the WearScore app to scan that care label and get an objective fabric grade before you buy. The difference between an A and a C isn't just academic. It's the difference between a sweater you'll reach for every cold morning for years and one you'll donate by February.