Animal

Possum fiber

Underfur used in specialty blends, particularly with wool.

Reviewed 2026-09-22. Evidence level: verified. Open the interactive profile.

Key figures

Species: Trichosurus vulpecula (common brushtail possum)
Fiber diameter by region: about 16.2 (belly), 17.7 (body), 22.9 (tail) microns
Fiber length by region: about 20, 27 and 38 mm
Introduced to New Zealand: first releases 1837; population established 1858
Protection removed: 1946

Approximate values under the stated conditions.

Overview

Underfur used in specialty blends, particularly with wool. Species and sourcing context matter.

Feel and behavior

Soft and lofty in blends.

Where you find it

Knitwear and accessories.

Source and geography

Possum fiber in textiles is the underfur of the common brushtail possum (Trichosurus vulpecula), an Australian marsupial introduced to New Zealand for a fur trade. It is not the American opossum (Didelphis), a different marsupial. In New Zealand the brushtail possum is officially a pest and, according to the Department of Conservation, the country's most damaging animal pest of native forest. Fiber enters the textile chain as a by-product of hunting and pest control, with fur recovered from the skins of killed animals. Because Predator Free 2050 aims to eradicate possums, a successful program would end this supply.

Advantages

Possum adds a light, soft halo and loft to merino without much added weight.
Blends are commonly described by producers as warm for their weight.
The fiber comes from an introduced pest that New Zealand already controls to protect native forest.
Merino in the blend supplies elasticity and shape retention.

Drawbacks

Pure possum yarn is impractical, so the fiber is always blended and the possum share varies.
Short fibers can shed from the surface, especially in the first wears.
Supply depends on pest control and would shrink if eradication goals succeed.
Fiber comes from killed animals, which some buyers reject regardless of the pest context.

Worth knowing

An Envirolink report estimated New Zealand's possum population at about 30 million, down from earlier estimates of 50 to 70 million.
Commercial possum hunting has been called a mixed blessing for conservation because hunters seek fur where it is easy to take, not where native forest is most at risk.
Possum-merino yarns are among the few mainstream knitting yarns made from the fur of an animal officially classed as a pest.

Types, grades and fabrics

Types and grades

Textile possum fiber is the underfur of the brushtail possum (Trichosurus vulpecula) from New Zealand, sold almost only in blends. The main trade forms are plucked fur, possum-merino knitting yarns and knitwear, and dressed possum pelts used for fur trims and throws, a separate product. Blends are defined by the possum share. Zealana, a New Zealand yarn brand, lists its Kauri worsted as 60 percent merino, 30 percent possum and 10 percent mulberry silk, and its Air range as 40 percent possum, 40 percent cashmere and 20 percent silk. Retail knitwear typically uses merino as the majority fiber with possum as a substantial minority, and silk or nylon added for strength and luster.

Fabrics and products

Most possum fiber ends up in knitted garments: jerseys, cardigans, beanies, scarves, gloves and socks, plus hand-knitting yarns from lace to worsted weight. Possum-merino socks and gloves are sold for outdoor and travel use. Silk-containing blends give drape and sheen for lighter shawls and fine-gauge knits. The possum share produces a soft halo on the knit surface. Fabrics are almost always knitted rather than woven, because the short, slippery fur needs the loft and give of a knit structure.

Buying and care

How to judge quality

Read the percentage label: a higher possum share gives more halo and softness but can shed more early in wear, and very low percentages add little. Feel for a light, soft, fuzzy surface with no harsh fibers. Check that labels say possum or brushtail possum, not opossum, rabbit or generic fur fiber, since cheaper haloed yarns can imitate the look. Ask whether the yarn was made in New Zealand, as most possum processing happens there. Claims of extra warmth or pill resistance are producer statements; pilling can be tested by standard methods such as ISO 12945-2 if a buyer needs data.

Care in detail

Hand wash in cool water with a gentle wool detergent unless the label states machine washable; some producers treat blends for machine washing on a wool cycle. Avoid hot water, agitation and wringing, which felt both the merino and the possum fibers. Rinse at the same temperature, roll in a towel and dry flat in shape. Do not tumble dry. Light shedding in the first few wears is normal; a lint roller or gentle brushing removes loose fibers. Press only with a cool iron through a damp cloth or use steam. Store folded, not hung, with a moth deterrent. The product label governs.

Care at a glance

Follow the complete product’s care label. Blends, dyes, finishes and construction can change suitable washing, drying and storage.

Environmental and social footprint

Possums are culled in New Zealand to protect native forest and birds and to control bovine tuberculosis, and fur recovery adds value to part of that control. An Envirolink report for regional councils estimated about 30 million possums after control efforts, lower than earlier estimates of 50 to 70 million. Whether commercial fur harvest aids conservation is contested: a 2012 study in Biological Conservation found that harvesting for economic return and controlling possums for biodiversity outcomes can pull in different directions, because hunters target accessible, high-yield areas rather than sites with the highest ecological priority. Animal welfare depends on trapping and poisoning methods. Processing impacts are mainly those of merino scouring and spinning.

Tradeoffs

Origin, processing inputs, labor, product construction and useful lifetime all need specific evidence. The name alone does not establish responsible production.

A useful question to ask: What exact material, product form and documented producer stand behind this name?

Science

Data sheet

Property	Value	Conditions	Source
Fiber diameter by body region	about 16.2 (belly), 17.7 (body), 22.9 (tail) microns	common brushtail possum fur, New Zealand	[2]
Fiber length by body region	about 20 (belly), 27 (body), 38 (tail) mm	same study	[2]

Protein-based natural material

Most hair is keratin; silk is a different protein-fiber system.

Structure and chemistry

Brushtail possum fur is keratin with a scaled cuticle and cortex. Yarn makers describe the fibers as hollow and link this to low weight and warmth, but quantitative data on medulla or porosity are scarce in open literature, so those claims should be treated as producer statements. Measurements reported to the New Zealand Society of Animal Production (Reid et al., 2007) show strong variation by body region: belly fur averaged about 20 mm long and 16.2 microns in diameter, body fur about 27 mm and 17.7 microns, and tail fur about 38 mm and 22.9 microns, with belly fur also less curved. The short length explains why possum is blended.

From source to yarn

After harvest, fur is removed from the skins, graded by body region and color, and cleaned. It is then intimately blended, usually as a minority component, with merino wool and sometimes silk, cotton or cashmere, before carding and spinning. Yarn producers state that 100 percent possum yarn is not practical because the fibers are too short to hold together; the merino supplies length and cohesion while the possum adds loft and halo. Possum percentages vary by brand and must be read from the label. A New Zealand spinner describes developing specific carding and blending settings to keep the slippery fur from dropping out.

Performance in use

Possum-merino blends are marketed as lighter and warmer than wool alone; one producer claims a 55 percent warmth gain, a figure not traceable to a published standard test and best treated as marketing. Producers also claim strong pilling resistance attributed to the fiber surface; independent pilling data (for example Martindale or pilling-box tests) should be requested before relying on it. As keratin blends, these yarns absorb moisture vapor, char rather than melt, take acid dyes, and can felt or shrink in hot, agitated washing. Short possum fibers can shed from the yarn surface, especially early in wear.

How it is identified

Burn tests (indicative only; conduct with care) cannot separate possum from merino, since both are keratin. Microscopy can often distinguish marsupial underfur from sheep wool by scale pattern, diameter and medulla, but quantifying a minority possum share in a blend requires fiber counts under the microscope by a trained analyst, and DNA methods can confirm species. Buyers should not confuse New Zealand possum with opossum fur from the Americas or with rabbit hair, both of which also appear in soft, haloed blends.

History

Timeline

1837The first releases of brushtail possums in New Zealand failed to establish. [1]
1858A possum population was established in Southland. [1]
1858 to 1922Some 36 batches of possums were imported, and by 1930 releases had been made at about 450 locations. [1]
1946All protection was removed and the possum came to be treated as an environmental pest. [1]
2012A study found that fur harvest for economic return and possum control for biodiversity can pull in different directions. [3]

Possum-fiber blends developed a recognizable niche in New Zealand knitwear. Claims about conservation benefit require evidence about the specific supply and collection system.

The deeper record

According to Te Ara, the Encyclopedia of New Zealand, the first releases of brushtail possums in 1837 failed, and a population was established in Southland in 1858. From 1858 to 1922 some 36 batches were imported, and by 1930 possums and their descendants had been released at about 450 locations. Hunting and selling skins were regulated until 1946, when all protection was removed after debate and the possum was treated as an environmental pest. Recovery of fur for blended knitwear grew later as a way to add value to control operations, and the government's Predator Free 2050 strategy now targets possums alongside rats and stoats.

Labeling and law

The FTC rule at 16 CFR 303.6 allows the name of a fur-bearing animal with the word fiber, hair or blend, for example possum fiber, when that fiber is 5 percent or more by weight, and otherwise the collective term fur fiber may be used when no claim about the animal is made. In the EU, Regulation (EU) No 1007/2011 does not list possum among the named fine animal hairs, so it falls in the animal hair category, where the kind of animal may be indicated. Statements that possum products support conservation are environmental marketing claims that need evidence about the specific harvest.

This describes what rules and standards cover. It is not legal advice; jurisdiction, product form and current rule text control.

Frequently asked

Is possum fur the same as opossum?

No. Textile possum comes from the Australian brushtail possum, Trichosurus vulpecula, introduced to New Zealand in the nineteenth century. The American opossum, Didelphis, is a different marsupial whose fur is a separate, minor product.

Why is possum always blended with merino?

Brushtail possum underfur is short and slippery, so it does not hold together in a yarn by itself. Merino provides fiber length, crimp and cohesion, and silk or nylon may be added for strength.

Is buying possum merino good for the environment?

Possums damage New Zealand's native forests and are controlled for that reason. Using their fur adds value to control work, but research has found that commercial harvest and conservation goals do not always coincide, so treat blanket conservation claims cautiously.

Does possum merino shed?

Some shedding is common in the first wears as loose, short possum fibers work free from the yarn surface. It usually settles down after a few wears and gentle washing. Heavy, continuing shedding suggests a loosely spun yarn or a high possum share.

Sources

Cite this page

Chaos. (2026). Possum fiber. In Fibers of Earth: An independent textile atlas. https://www.hendrickresearch.com/fibers/materials/possum/