Why the Grade on the Label Is Rarely the Grade in the Box

Cashmere grades A, B and C describe a fiber classification system used across the textile industry to sort raw cashmere by its physical properties before spinning. The problem is that this grading rarely appears on a finished garment. A retailer can legally describe almost any cashmere blend as simply "cashmere" without specifying whether the fiber started life as Grade A combed from a Mongolian plateau or Grade C salvaged from shorter, coarser regrowth. The label, in most cases, tells you nothing useful.

Isabel, the editor behind this guide, once found a Grade C fiber garment hanging on a polished rail at a well-regarded London department store, priced accordingly, with no fiber specification beyond "100% cashmere." The hand-feel was warm and soft enough at first contact; it was only the rub test, applied for ten seconds at the cuff, that revealed the shedding. Three weeks later, the same store quietly pulled the style. The label had been technically truthful. The garment was not worth the price.

What follows is a working guide to how the classification actually functions, what the physical differences look and feel like, and how that translates into a sweater that either pills apart by February or holds its shape for a decade.

The Three Grades: What the Numbers Actually Mean

Cashmere fiber is assessed on two primary metrics: diameter, measured in microns (one micron equals one millionth of a meter), and staple length, measured in millimeters. Both values are determined at the raw combing stage, when the underbelly fiber of the Capra hircus goat is separated from the coarser outer guard hair.

Grade A sits at the top. Its fibers measure 14 to 15.5 microns in diameter and typically fall between 36 and 44 millimeters in length. At this diameter, the fiber is fine enough to sit below the threshold of human tactile perception, the point at which skin registers coarseness. The longer staple means fibers interlock during spinning without breaking, producing a yarn with good tensile strength and low tendency to shed loose fiber (which is what pilling is).

Grade B occupies the middle band. Fiber diameter runs from approximately 16 to 18 microns, with staple lengths that can dip below 34 millimeters. A Grade B sweater may feel soft in the shop, particularly when manufacturers apply softening finishes, but that initial softness fades. After several washes, the coarser fiber begins to migrate to the surface and forms pills, especially at high-friction zones: the underarm, the cuff, anywhere a bag strap sits.

Grade C is the coarsest classification, with fibers above 18-19 microns and shorter staple. It is generally used in blended products, linings, or budget knitwear where cost is the overriding concern. A pure Grade C cashmere garment is relatively rare in the Western retail market, but blended Grade C fiber mixed into a "100% cashmere" yarn happens more often than the industry acknowledges publicly.

Where the Fiber Comes From Changes Everything

The geography of cashmere production matters more than most buying guides acknowledge. **Mongolia's** Gobi plateau and China's Inner Mongolia region produce the majority of the world's raw cashmere, and within those regions, conditions vary significantly between grazing areas. High-altitude animals that endure harsh winters develop finer, longer underfleece as a biological adaptation. The cold forces the fiber to grow dense and close; lower-altitude animals in milder climates produce shorter, coarser yields.

Iran, Afghanistan and the **Kashmir Valley** in northern India also produce cashmere, historically considered among the finest. Kashmiri raw fiber, sometimes labeled *pashm* in the regional trade, traditionally grades very high in fineness, and the hand-spinning traditions of the region produce yarn with a character that machine-spun yarn struggles to replicate. Scotland's Hawick mills and Italy's **Biella** valley are not growing regions; they are processing regions, where raw imported fiber is spun, finished and often elevated by machinery and expertise that produce a more consistent final product.

How Grade Translates to Spinning and Ply

The grade of the raw fiber feeds directly into how the yarn is constructed. Grade A fiber, being longer and finer, can be twisted into a tighter, more coherent yarn without excessive breakage. This allows spinners to produce two-ply or even single-ply yarns of genuine fineness. A two-ply Grade A yarn, where two spun strands are twisted together in opposition, creates a round, stable thread that holds its structure through repeated washing and wearing.

Grade B fiber, shorter in staple, requires more twist to hold the yarn together. Heavier twist adds a slight roughness to the finished fabric, not always perceptible initially, but present under close examination. It also contributes to a denser, heavier gauge fabric that can feel warm but lacks the characteristic drape of fine-grade cashmere.

Ply count alone does not indicate quality. A four-ply garment made from Grade C fiber is not superior to a two-ply garment made from Grade A. Ply refers to the number of individual yarn strands twisted together; it says nothing about the micron count or staple length of those strands.

How to Assess Grade Without a Laboratory

A spectrophotometer measures fiber diameter precisely. Most wardrobes lack one. Three practical tests serve as reasonable proxies when handling a garment in a shop or assessing a purchase online.

The rub test: Hold a section of the knit between thumb and forefinger and rub gently for five to ten seconds. Grade A cashmere will produce very little loose fiber. Lower-grade material sheds noticeably. This is a surface test and can be fooled by heavy finishing treatments, but it remains useful as a first screen.

The stretch test: Pull the garment gently at two points and release. Good cashmere, properly spun and finished, returns to its original shape without distortion. A garment that sags, grows, or loses definition under light tension has either been poorly spun or knitted at too low a gauge to hold structure.

Weight and gauge: A lightweight, finely knitted garment made from Grade A fiber will feel insubstantial in the hand but warm in wear, a counterintuitive quality that surprises first-time buyers of quality cashmere. A heavy, dense knit is not necessarily superior; sometimes it reflects coarser fiber requiring more bulk to achieve the same warmth.

The Problem with "100% Cashmere" Labeling

Under current EU and US textile labeling regulations, a garment labeled "100% cashmere" must be composed entirely of cashmere fiber. Neither regulation specifies fiber diameter or staple length. This means a garment spun entirely from Grade C fiber satisfies the legal requirement for the label just as fully as one made from Grade A fiber averaging 14.5 microns. The label is technically truthful and practically uninformative.

Some producers have moved toward voluntary disclosure. A small number of mills and brands now print micron count directly on the garment label or product page, 15.5 microns, for example, or "Grade A, combed Mongolia." This is a positive development, though it remains uncommon in mass-market retail. When a producer discloses micron count, it is worth noting: they do so because the number is good. Producers who do not disclose it rarely have a number worth sharing.

Blending is the other labeling issue. Cashmere blended with merino wool, silk, or nylon can be labeled by fiber content percentage, "70% cashmere, 30% merino," and that blend may outperform a poorly made pure cashmere garment at half the price. A quality cashmere or fine-knit sweater built from a clean fiber blend, honestly labeled, is worth more than a "100% cashmere" garment assembled from recovered short fiber.

Pilling: Cause, Timeline and What It Reveals

Pilling is not a sign of wear. It is a sign of fiber length. Short fibers, whether from Grade B cashmere, recovered fiber, or cashmere blended with unannounced synthetic content, migrate to the fabric surface through friction and form small knots. Those knots catch more surface fiber and grow. A garment that pills aggressively within the first three to five wears almost certainly contains short-staple or coarse fiber, regardless of its stated grade.

Grade A cashmere pills too; every natural fiber does under sufficient abrasion. The process takes far longer, and the resulting pills are smaller and more easily removed with a flat-head fabric comb or a fine-gauge cashmere comb without damaging the underlying structure. High-grade cashmere is not immune to pilling: it is defined by the slowness and manageability of the process.

The underarm and the cuff edge are the most reliable test zones. After ten wears, examine these areas under natural light. Heavy pilling at these friction points in a new garment is diagnostic. Light, easily removed surface fluff is normal and not a cause for concern.

Washing, Storage and Long-Term Fiber Integrity

Cashmere degrades fastest through two routes: heat and compression. Hot water causes the protein scales on each fiber to open and interlock permanently, a process called felting (an irreversible shrinkage and hardening of the fabric). Compression, folding under heavy weight or storing in tight spaces, distorts the three-dimensional crimp structure of the fiber that gives cashmere its characteristic loft.

A Grade A cashmere sweater washed in cool water (under 30 degrees Celsius) with a pH-neutral wool detergent, laid flat to dry on a clean towel, and stored folded rather than hung will retain its structure across many years of use. Hanging cashmere stretches the fabric under its own weight; the shoulder area develops permanent distortion within a single season of hanging storage.

Cedar blocks or sachets of dried lavender placed near stored knitwear deter moth larvae without the chemical residue of synthetic moth deterrents, which can leave a smell that adheres to cashmere fiber. The simplest form of long-term care is infrequent washing. Cashmere aired after wearing and only washed when genuinely soiled extends the useful life of any garment considerably.

Reading Between the Lines When Shopping

A few signals, taken together, narrow the range of what a garment is likely to contain. Price is one input, not a guarantee. A Grade A cashmere sweater retailing under $80 at scale is commercially implausible given raw fiber costs; something in that garment is not what it appears. The inverse is not reliably true either: a $400 cashmere sweater from a positioning-conscious brand may use Grade B fiber processed beautifully and marketed with restraint.

Country of processing is a more useful signal than country of origin. Knitwear processed in Scotland's Borders mills or in Biella tends to reflect the standards of those manufacturing traditions, where quality control is enforced partly by reputation and partly by the expectations of brands that have sourced there for decades. This does not mean processing elsewhere implies inferior quality. Excellent cashmere processing happens across Asia and Europe, but established mill regions carry institutional knowledge that shows in the finished product.

The most reliable signal of all remains direct fiber disclosure: a brand willing to state micron count and sourcing region has already told you more than most of its competitors. That transparency, however incremental, is worth something when making a purchasing decision. It is also worth noting that producers who disclose nothing rarely do so out of modesty.

Cashmere as a Long Investment, Not a Seasonal Purchase

The argument for Grade A cashmere is ultimately a cost-per-wear argument. A sweater that pills and loses structure after two seasons costs more per wearing than one that holds for eight to ten years of regular use. That calculation holds whether the initial price is $150 or $600. The fiber grade at the source determines, more than any other single factor, which side of that equation a garment lands on.

The broader wardrobe logic matters here too. A well-chosen cashmere or fine-knit sweater in cream, camel, or charcoal functions across a decade of combinations: over an oxford cloth shirt, under a tweed sports coat, worn alone with straight-leg trousers. That versatility amplifies the value of the initial investment. A garment purchased cheaply and replaced frequently never accumulates the quiet authority of one that stays and improves with time.

Understanding cashmere grades A, B and C is not an exercise in luxury signaling. It is straightforward consumer knowledge, the kind that makes shopping less wasteful, less expensive over time, and considerably more satisfying. The fiber does not care about the brand. It cares about microns, length and the hand that combed it.

FAQ

What is Grade A cashmere exactly?+

Grade A cashmere refers to raw cashmere fiber with a diameter of 14 to 15.5 microns and a staple length of 36 to 44 millimeters. These two measurements determine how fine and how strong the resulting yarn will be. Grade A is the highest classification in the industry's standard sorting system and produces the softest, most durable finished knitwear.

Can I tell cashmere grade by touch alone?+

Partially. Grade A cashmere held against the inner wrist should feel completely smooth, with no prickling. Grade B may feel soft initially but becomes coarser after washing. The rub test (rubbing a section between fingers to check shedding) and the stretch-and-return test (checking shape recovery) provide additional data points. Finishing treatments can temporarily mask lower-grade fiber, so in-store tests are more reliable after the garment has been worn and washed once.

Is a Grade B cashmere sweater worth buying?+

It depends on the price and intended use. A well-constructed Grade B garment at an honest price, bought with the expectation that it will show surface pilling within two to three seasons, represents a reasonable transaction. The problem arises when Grade B fiber is sold at Grade A prices under vague labeling. For next-to-skin knitwear worn frequently, Grade A is worth the price difference. For outer layers worn occasionally, Grade B may suffice.

Does a higher ply count mean better cashmere?+

No. Ply count refers to how many individual yarn strands are twisted together in the finished thread. A four-ply garment is heavier and warmer but not inherently finer. Quality begins with the fiber grade before spinning. A two-ply yarn made from 14.5-micron Grade A fiber will outperform a four-ply yarn made from 18-micron Grade B fiber in terms of softness and longevity.

How should cashmere be washed to preserve its grade qualities?+

Hand wash in cool water (under 30 degrees Celsius) with a pH-neutral detergent formulated for wool or cashmere. Never wring; press water out gently by folding the garment against itself. Lay flat on a clean, dry towel to reshape and dry away from direct heat or sunlight. Avoid repeated dry cleaning, which strips lanolin from the fiber over time. Store folded, never hung, to prevent shoulder distortion.

Why does cheap cashmere feel soft in the shop but rough after washing?+

Manufacturers apply softening finishes, often silicone-based, to lower-grade fiber during the final processing stage. These treatments coat the fiber surface and temporarily suppress the coarseness of Grade B or Grade C material. One or two washings remove the coating, and the underlying fiber reveals itself. This is one reason the rub and wrist tests are more informative on a garment that has already been laundered at least once.