Spotting real wool inside a pre-owned cashmere blend
A second-hand knit can look like the find of the season: soft, slouchy, and discounted well below retail. Yet underneath that flattering drape, the fibre content is often a puzzle. Cashmere is regularly blended with wool, acrylic, viscose, or recycled fibres, and on a pre-owned piece the original label may be missing, faded, or misleading. For shoppers who love resale but refuse to gamble on quality, learning to evaluate a blend by touch, sight, and a few simple experiments is the most reliable path forward.
Australian readers bring a particular advantage to this detective work. The country produces most of the world's fine apparel wool, and the Woolmark logo still carries weight in local stores from Sydney's Strand Arcade to Melbourne's Chapel Street. Generations of shoppers grew up sorting through school uniforms, bush jumpers, and ballet cardigans labelled "100% pure new wool", so the tactile signature of the real thing is something many already recognise in their hands.
What a cashmere blend usually means on the tag
Pure cashmere comes from the soft under-fleece of cashmere goats, mainly harvested in Inner Mongolia, China, and parts of Central Asia. A garment labelled "100% cashmere" is genuinely fibre from those goats. When the label instead reads "cashmere blend" or "cashmere wool blend", it means cashmere has been mixed with another fibre, almost always to reduce cost or improve durability. Common companions include merino wool, regular sheep's wool, silk, viscose, nylon, or acrylic.
Brands rarely blend in equal measure. A typical ratio is 70% wool to 30% cashmere, or 50/50, with smaller percentages of cashmere showing up in mass-market knitwear. Drop below 20% cashmere and the garment will feel rougher, pill faster, and behave more like the dominant fibre, whether that is wool or a synthetic. Knowing the intended ratio helps you predict how the piece should feel, drape, and age.
The hand-feel test before you leave the shop
Real wool, including merino, has a particular springiness. Press the knit between your fingers and release: genuine wool rebounds slowly and keeps the impression for a beat. Cashmere feels softer because its fibres are finer, but it also has body. Synthetics, by contrast, feel slick, almost squeaky, and tend to spring back immediately with no memory of the press.
Slip your hand inside the garment and rub the inner surface against itself for ten seconds. If your palm comes away slightly tacky or you can feel static building, the blend leans synthetic. Real wool generates very little static. Hold the knit up to the light and stretch a small section gently. Wool and cashmere return to shape; acrylic and other synthetics often hold the stretch or look slightly translucent where the weave has thinned.
Tactile clues that point to real wool content:
- A faint, slightly animal smell, especially when the knit is warm or damp
- Visible crimp in the yarns when you unpick a loose thread from a seam
- A matte rather than shiny surface
- Warmth building against the skin within seconds, even in a chilly shop
The burn test and other hands-on experiments
A small, controlled burn is the most conclusive way to identify fibre content. Pull a few loose threads from an inside seam where they will not be missed, place them on a ceramic dish, and apply a lit match or lighter. Watch how the thread burns, how it smells, and what is left behind. Always do this near a sink or with water nearby.
Burn characteristics worth memorising:
- Real wool and cashmere smoulder slowly, smell like burning hair, and leave a brittle black ash that crushes to powder
- Cotton or viscose burns steadily with a paper-like smell and soft grey ash
- Acrylic and other synthetics melt, curl into a hard plastic bead, and smell sharply chemical
- Silk burns slowly with a similar hair smell to wool, but the ash is finer and darker
If pulling threads feels too invasive, drop a small snipped corner in a glass of water. Wool absorbs water quickly and sinks within minutes. Synthetics tend to float or take much longer to wet through. Both tests are best done on inconspicuous fibres and never on a piece you intend to return.
Reading labels and watching how the knit behaves
When a label survives, treat it as a starting point rather than gospel. In Australia, the Country of Origin label is mandatory under ACCC rules, and the fibre composition must be accurate to within a small tolerance. Imported vintage pieces, however, were often labelled to local rules that differ, and pre-loved garments from other markets may carry percentages that do not match Australian standards. A label reading "wool" with no further detail almost always means standard sheep's wool, not merino. "Virgin wool" or "new wool" indicates wool that has not been recycled, while "recycled wool" appears on older or budget pieces.
Behaviour over time is a reliable signal. Wool pills, but it pills in soft, fuzzy balls that can be shaved away and rarely compromise the knit's structure. Acrylic pills in harder, shinier nubs that cling stubbornly. Cashmere pills faster than wool, especially under the arms and along the sides, and heavy pilling across the whole front of a garment often signals cashmere mixed with a cheaper fibre trying to mimic the look.
Price, provenance, and where you bought it
Price is rarely a perfect indicator, but extreme bargains should raise questions. Cashmere fibre is expensive to produce, sort, and spin, and a fully cashmere jumper at thirty dollars in a Sydney market stall is almost certainly mislabelled. In a blended piece, a low price tag suggests a high percentage of the cheapest fibre, which is usually acrylic. Melbourne buyers browsing Camberwell Sunday Market or Paddy's Markets in Sydney will know to weigh the deal against the fibre reality.
Where the garment was sold matters just as much. Established boutiques with reputations to protect tend to source carefully and label honestly, which is why curated resale shops have become a trusted alternative to online marketplaces. Browsing the current consignment inventory gives shoppers a starting point where each piece has been reviewed for fibre quality before it goes on the rack. That kind of vetting removes much of the guesswork that comes with unmoderated platforms.
Why Australian shoppers start with a built-in advantage
Australian wool is benchmarked worldwide, and the Woolmark certification on a label still indicates a level of fibre quality that generic "wool" cannot match. Local shoppers also have access to a thriving resale scene that knows its fabrics. Brisbane's Davies Park Market, Adelaide's Central Market fashion traders, and the network of curated consignment boutiques across the eastern suburbs all carry pieces with provenance stories attached.
Climate plays a supporting role. A Melbourne winter can be damp and cold for months, which is exactly the weather that exposes a poorly made blend. A jumper that loses shape after one wearing on a tram ride through the CBD, or one that holds static through a heated Sydney office, is giving away its fibre content in real time. Wearing the knit through its first Australian winter is, in a sense, the longest-running burn test of all.
Caring for a blended cashmere find
Once you have bought the piece, the way you care for it will either confirm or contradict your fibre suspicions. Wash blended cashmere and wool inside out in cold water with a gentle wool detergent, then roll it in a towel to remove excess moisture before flat drying. Never hang a wet wool blend; the weight of the water will distort the shoulders and stretch the neckline.
Store the knit folded in a drawer with cedar blocks or lavender sachets, particularly during the warmer months when clothes moths are most active in Queensland and New South Wales. Use a cashmere comb or a battery-operated fabric shaver sparingly on pilling areas, and avoid the dryer entirely. A blend that holds its softness and shape through several Australian winters is almost certainly built on a real wool foundation.
The Paper Chandelier curates pre-owned designer and contemporary pieces with an eye for fibre integrity. Stop by the Littleton boutique, book a private styling appointment, or browse the latest arrivals to see which knits have just landed and which blends have earned a place in this season's wardrobe.