High Street Cashmere vs Luxury Cashmere: What's Actually Different?

High street cashmere and luxury cashmere are made from the same animal — but they are absolutely not the same product, and understanding why could save you from a lot of disappointment (and wasted money). The difference comes down to fibre quality, construction, and sourcing, and once you know what to look for, you'll never pick up a jumper the same way again.

I've spent years testing both ends of the cashmere spectrum — from a £45 M&S roll-neck I wore to death one winter, to a Johnstons of Elgin crewneck that still looks pristine after seven years of regular wear. Both have their place. But only one of them is truly an investment.

It All Starts With the Fibre

Cashmere comes from the fine undercoat of cashmere goats, and the quality of that fibre varies enormously depending on where the goat is from, the time of year it's shorn, and how the fleece is processed. The two measurements that matter most are:

Fibre diameter — measured in microns. Luxury cashmere sits at around 14–15.5 microns (finer = softer and less scratchy). High street versions can creep up to 16–19 microns, which won't feel rough exactly, but you'll notice the difference side by side.
Fibre length — longer fibres pill significantly less and hold their shape better over time. Short fibres feel glorious for about three wears, then start bobbling almost immediately.

The Ply Problem Nobody Tells You About

This is genuinely the thing that catches people out most, and I wish someone had explained it to me years ago. Single-ply cashmere — which is what most high street pieces use — feels incredibly soft in the shop. Sometimes softer than a luxury piece. That initial squishiness is almost irresistible.

But that softness is actually a warning sign. Single-ply means one thread, which hasn't been tightened into a durable yarn. Within a season, you'll have a shapeless, pilling mess. Two-ply or more — where two threads are twisted together — creates a yarn that's more robust, more structured, and will genuinely last. Luxury brands always use two-ply minimum. Most high street brands do not.

Where the Cashmere Actually Comes From

Luxury houses like Loro Piana and Brunello Cucinelli source their fibres from specific regions — Inner Mongolia, the Gobi Desert highlands, or even from their own herding relationships. They pay a premium for consistency and grade. High street brands buy from broader supply chains where fibre grades are often mixed, which brings costs down but means quality varies batch to batch. That's why you can sometimes find a brilliant high street cashmere one season and a much thinner version in the same style the following year.

The Blending Issue

Always check the label. Some high street "cashmere" is actually a blend — mixed with wool, viscose, or even synthetic fibres to reduce cost. This isn't always obvious from the product title, so flip the garment over and look. A genuine luxury cashmere piece will state 100% cashmere, no exceptions. Anything less is a compromise, and you'll feel it.

Where to Shop: My Honest Brand Breakdown

High Street Options — worth it for occasional wear and accessible price points:

M&S — consistently one of the best value cashmere options on the high street. Their Pure Cashmere range uses a reasonable ply construction and the colours are always spot-on. Not a forever piece, but great for a few seasons.
Arket — genuinely impressive for the price. They use 2-ply construction and are transparent about sourcing, which I really respect. I've had Arket pieces last three or four seasons with proper care.
Cos — beautifully minimal pieces with a clean aesthetic. Quality has improved noticeably in recent years. Good for classic styles you'll wear on repeat.
The White Company — a solid mid-market option. Their cashmere basics are well finished and the fit is reliable. A favourite for gifting because the presentation feels premium even at accessible prices.
Hush — quietly brilliant for knitwear. Their cashmere blend pieces wear really well and the styling feels genuinely considered rather than trend-chasing.
Massimo Dutti — often overlooked, but their cashmere is some of the best you'll find at this price bracket. Structured, well-cut and the kind of classic that doesn't date.
Jigsaw — a perennial favourite for knitwear. Their cashmere pieces have a lovely drape and the brand tends to invest more in construction than the pure high street names.

Premium Options — the sweet spot between high street and full luxury:

Me&Em — outstanding quality at a premium price. Their cashmere jumpers are consistently praised in style press and customer reviews alike. The fit is excellent and these will genuinely last years.
Reiss — a step up in quality with sharp styling. Their knitwear sits in a great position: noticeably better than high street, and considerably more accessible than designer.

Luxury Options — genuine investment pieces:

Johnstons of Elgin — a Scottish heritage brand that has been producing cashmere since 1797. The quality is extraordinary, the provenance is impeccable, and a well-cared-for piece will outlast most things in your wardrobe by decades.
Loro Piana — the gold standard for cashmere globally. Eye-wateringly expensive, but if you want one truly exceptional cashmere piece in your lifetime, this is where you go.

Independent Brands Worth Knowing:

Begg x Co — a Hawick-based Scottish brand with 150 years of heritage. They produce some of the most beautiful cashmere and wool pieces you'll find anywhere, often in archive-quality colourways you simply won't see on the high street. A genuine discovery.
Jumper 1234 — a small, independent London brand entirely dedicated to knitwear. Their cashmere is sourced carefully, their sizing is generous and honest, and the brand has a cult following among stylists for very good reason.

So Is High Street Cashmere Worth Buying?

Honestly? Yes — but with realistic expectations. High street cashmere is a treat, not a treasure. If you need a cashmere jumper for regular daily wear and you're not ready to invest in a forever piece, Arket and M&S are your best bets. If pilling drives you absolutely mad (same), go premium or go without. And if you're buying once and buying properly? Johnstons of Elgin, always.

One final thing: when cashmere pills aggressively after just a few wears, please don't blame yourself. It's not how you washed it. It's the fibre quality. Short fibres pill — that's a production issue, not a care issue.

Never Get Sizing Wrong Again — Try Tellar

Once you've found your perfect cashmere, the last thing you want is for it to arrive in the wrong size. That's exactly why Tellar.co.uk exists. Tellar is the UK's leading free sizing tool — and it's genuinely brilliant.

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Use the Store Size Lookup tool to get your precise size in any brand — from COS and Arket to Reiss and Jigsaw.
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And when you're ready to explore more style advice, the Tellar Fashion Hub has a library stacked with free posts from our top stylists. Honest. Unbiased. Independent. Always free. Whether you need help with sizing, trends, or figuring out what actually suits your shape — it's all there.

A few posts worth bookmarking while you're here:

The Ultimate Clothing Sizing Guide — everything you need to know about sizing across brands
Jeans Trends 2026 — the cuts and washes worth investing in right now
Ultimate Guide to Dresses & Best Buys — styles, shapes, and where to shop
Ultimate Guide to Jackets & Best Buys — find your best fit whatever your shape