Is Cashmere Plastic-Free?

What is Cashmere?

Cashmere is the fine, soft undercoat of cashmere goats, collected mainly by combing during the molt. Like sheep wool it is keratin, an animal protein, but far finer and softer, which is what gives cashmere its warmth-to-weight and luxury hand. It is a plastic-free protein fiber.

Fiber type

Natural, protein (animal)

Source

Cashmere goat undercoat (Capra hircus)

Biodegradable

Yes

Sheds microplastics

No

How is Cashmere made?

The undercoat is combed or shorn, then dehaired to separate the fine down from coarse guard hairs, washed, and spun. Because each goat yields only a small amount of usable down per year, cashmere is scarce and expensive, which is exactly why it is so often blended with cheaper synthetics.

How does Cashmere perform?

Extremely soft, warm for its weight, and breathable. Its weaknesses: it pills, is prone to abrasion and moth damage, and is costly. It has no stretch. Those limits, plus the price, are why so much market cashmere is a cashmere-acrylic or cashmere-nylon blend rather than pure.

So, is Cashmere plastic-free?

Yes, pure cashmere is plastic-free. It is a natural protein fiber with no petroleum polymer and it biodegrades. The critical check is the blend: a cashmere-acrylic or cashmere-nylon sweater is not plastic-free, and these blends are common precisely because pure cashmere is expensive. Read the composition, not just the word cashmere on the front.

Where you see it: Premium sweaters, scarves, wraps, and luxury knitwear.

The OHZEHN-TEX™ take

Pure cashmere is a genuinely plastic-free luxury fiber; the plastic usually enters through the acrylic or nylon it is blended with to cut cost. OHZEHN-TEX™ is our own bio-based performance fabric platform: bio-based nylon PA6.10 made from castor oil, with a bio-based stretch fibre made from sugarcane.

Does cashmere shed plastic microfibers the way synthetics do?

No, and this is where a pure-cashmere garment separates from the acrylic that imitates it. Cashmere is keratin, the same class of animal protein fiber as sheep wool. A 2024 peer-reviewed study of marine biodegradation (Collie, Brorens, Hassan and Fowler, Water, Air, & Soil Pollution, vol. 235, article 283, 2024) found that wool biodegraded substantially in simulated seawater while polyester, nylon, and polypropylene showed almost no biodegradation over the same window. The study tested wool rather than cashmere specifically, but both are keratin protein, so the mechanism is the same: when a protein fiber sheds, the fragment is digestible by microbes and does not persist as plastic. DOI: 10.1007/s11270-024-07093-6

The consequence for a line is simple. The microfiber problem is a property of the synthetic, not of knitwear in general, and the most-cited laundry study puts acrylic at the very top of the shedding table. So a cashmere sweater cut with acrylic or nylon to hit a price carries exactly the plastic-shedding behavior buyers are trying to avoid, while the cashmere content itself does not. The fiber is clean; the blend is where plastic enters. See how polyester and nylon behave for contrast.

What is the real catch with cashmere?

It is not plastic, it is land and honesty. Cashmere goats are hard on grassland, and demand has multiplied the herds. A 2013 study in PLOS ONE (Liu, Evans, McCabe and colleagues, vol. 8, issue 2, e57599) documented that Mongolia's goat population rose from about 4.4 million in 1988 to roughly 20 million by 2008, that over 70 percent of the country's territory showed degradation against its natural state, and the authors tie the surge in goat numbers partly to global demand for cashmere. The study attributes most of the vegetation decline to climate, with overgrazing as the main driver layered on top, so the honest framing is that cashmere is a plastic-free fiber with a real grazing footprint, not a free lunch. DOI: 10.1371/journal.pone.0057599

The second catch is what actually arrives in the box. Under the US Wool Products Labeling Act and the Cashmere and Camel Hair Manufacturers Institute standard, true cashmere must average no more than 19 microns in fiber diameter, with no more than 3 percent of fibers over 30 microns. Much of what sells cheaply does not meet that, or is not cashmere at all: in 2021 the Institute brought a federal case (CCMI v. Amazon.com, Case No. 1:21-cv-11872, U.S. District Court for the District of Massachusetts) over scarves sold as 100 percent cashmere that lab testing found were 100 percent acrylic. For a brand the lesson is to specify fiber diameter and composition on the tech pack and verify it by test, not by the word on the label. That testing discipline is the same one behind fabric manufacturing.

Where this fiber lands in production

If you are speccing this fiber into a line, these are the programs it touches most. Cashmere shows up most in basics and blanks manufacturing and bra and sleepwear production, and the standard that governs all of it is set out at fabric manufacturing.