What Is Cashmere? (And Why So Much of It Is Fake)

Cashmere has a reputation problem. Not because the fabric isn't exceptional — it is. But because so much of what's sold as "cashmere" isn't actually cashmere, or is so low-grade it might as well not be.

Here's what real cashmere is, why the counterfeiting problem is so widespread, and how to make sure you're getting what you pay for.

What Cashmere Actually Is

Cashmere is the fine undercoat of cashmere goats (Capra hircus). These goats — primarily raised in Mongolia, China, Iran, and Afghanistan — develop an ultra-fine downy layer beneath their coarser outer coat to survive harsh winters where temperatures drop to -40C.

The fibres are extraordinarily fine: 14-19 microns in diameter, compared to 20-40 microns for regular sheep's wool and 60-120 microns for human hair. This fineness is what gives cashmere its signature softness — the fibres are too delicate to trigger the prickle receptors in human skin.

Each goat produces just 150-200 grams of usable cashmere per year. The fibre is collected by hand-combing during spring moulting season, then sorted to separate the fine undercoat from coarser guard hairs. It takes the annual yield of 2-3 goats to make a single sweater.

This fundamental scarcity is why real cashmere costs what it does — and why the incentive to fake it is enormous.

Why Cashmere Performs Differently

Cashmere isn't just "soft wool." Its physical properties are genuinely distinct:

• Warmth-to-weight ratio — cashmere is one of the warmest natural fibres relative to its weight. A thin cashmere layer outperforms a thick wool sweater.
• Temperature regulation — unlike synthetics that trap heat indiscriminately, cashmere breathes. It keeps you warm outside and comfortable inside. This is why cashmere works as a year-round fabric in lighter weights.
• Moisture management — cashmere absorbs up to 30% of its weight in moisture without feeling damp, then releases it gradually.
• Natural odour resistance — the protein structure of cashmere fibres inhibits bacterial growth, meaning garments can be worn multiple times between washes.

The Counterfeiting Problem

Here's the uncomfortable truth: an estimated 90% of cashmere sold globally may be mislabelled, blended, or adulterated.

A 2019 study by the Cashmere and Camel Hair Manufacturers Institute tested retail cashmere products and found widespread mislabelling. Items sold as "100% cashmere" contained merino wool, yak hair, rat fur, and synthetic fibres. Some contained zero cashmere.

Why is this so common?

• Price pressure — global demand for cashmere has surged (driven by fast fashion brands offering "affordable cashmere"), but goat populations and fibre production haven't kept pace. The math doesn't work.
• Detection difficulty — distinguishing cashmere from fine merino wool or yak down requires microscopy or DNA testing. Consumers can't tell by touch alone, and even experienced buyers can be fooled.
• Weak enforcement — textile labelling fraud is rarely prosecuted. The penalty-to-profit ratio makes cheating rational for unscrupulous suppliers.
• Long supply chains — cashmere passes through multiple middlemen between Mongolian herders and your wardrobe, with adulteration possible at every stage.

In 2020, Italian authorities seized 18,000 garments from luxury brands that were labelled cashmere but contained primarily other fibres. This isn't just a fast-fashion problem — it reaches into premium retail.

How to Identify Real Cashmere

No single test is definitive outside a lab, but combining several gives you strong confidence:

The price test

A genuine cashmere sweater costs at minimum $80-100 (and that's for basic quality). Premium 2-ply cashmere from reputable brands runs $200-500+. If a "cashmere" sweater costs $30, it is not cashmere. The raw fibre alone costs more than that.

The touch test

Real cashmere feels soft but not slippery. It has a slight natural grip. Fake cashmere (often treated with softening chemicals) feels artificially silky or oily. Real cashmere has a dry, airy softness.

The visual test

Real cashmere has a matte, slightly fuzzy surface. It doesn't have a sheen. If it looks shiny or glossy, it's likely treated synthetic or silk-blended.

The stretch test

Gently pull the fabric and release. Real cashmere springs back to its original shape. If it stays stretched, the cashmere content is low or the fibres are short and poorly constructed.

The pilling test (over time)

Real cashmere pills initially — this is normal and actually a sign of authenticity. The pills should stabilise after a few wears and can be removed with a cashmere comb. Fake cashmere pills aggressively and permanently, getting worse over time.

The burn test

If you're willing to sacrifice a small sample: real cashmere (an animal protein fibre) smells like burning hair, burns slowly, and leaves a crushable ash. Synthetic fibres melt into hard beads and smell like plastic.

Cashmere Grades

Not all genuine cashmere is equal. Quality varies significantly:

Longer fibres produce stronger, less pill-prone garments. Finer fibres produce softer ones. 2-ply construction (two yarns twisted together) is stronger and more durable than single-ply. The best cashmere combines all three — and you can feel the difference immediately.

The Environmental Angle

Cashmere has a complicated environmental profile:

The concerns:

• Overgrazing — surging demand has led to massive herd expansion in Mongolia. The goat population tripled between 1990 and 2020, contributing to grassland degradation across 70% of Mongolia's pastures.
• Desertification — cashmere goats pull plants up by the roots (unlike sheep, which crop grass). Overgrazing accelerates soil erosion and desertification.
• Carbon footprint — goats produce methane. Large herds on degraded land create a significant greenhouse gas contribution.

The nuance:

• High-quality cashmere from responsibly managed herds is sustainable — the fibre is natural, biodegradable, and garments last decades.
• The problem is scale. Cheap cashmere from fast fashion demands more goats, driving overgrazing. Premium cashmere from careful herders is a different product entirely.
• Buying fewer, higher-quality cashmere pieces that last 10-20 years has a radically different footprint than buying cheap cashmere that falls apart in two seasons.

How to Care for Cashmere

Good cashmere lasts decades with proper care. Poor care destroys it in months.

• Wash rarely — cashmere is naturally odour-resistant. Air it out between wears rather than washing after every use. Wash every 3-5 wears, or when visibly soiled.
• Hand wash only — cool water (20-30C), gentle detergent or baby shampoo. Soak 10-15 minutes, gently press. Never wring, twist, or rub.
• Dry flat — roll in a towel to remove excess water, then lay flat on a clean surface. Never hang (stretches) or tumble dry (shrinks and felts).
• Store folded — never on hangers (shoulder bumps). Use cedar blocks or lavender sachets to deter moths.
• De-pill gently — use a cashmere comb or fabric shaver. Pilling is normal during break-in and doesn't indicate low quality.

The Bottom Line

Real cashmere is one of the finest natural fabrics available — warmer, softer, and lighter than wool, with temperature-regulating properties that synthetics can't match. The problem isn't the fabric; it's the market surrounding it.

If you're buying cashmere: spend more, buy less. A single high-quality cashmere sweater from a reputable brand, cared for properly, will outlast ten cheap "cashmere" sweaters from fast fashion — and actually be cashmere.

Trust the label only as far as you trust the brand behind it. And when the price looks too good to be true, it always is.