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Not all cashmere is the same material. A $50 sweater and a $600 sweater can both carry an accurate cashmere label — the difference is in the fiber used to make them. Cashmere is graded before it's ever spun into yarn, based on how fine each fiber is and how long. Grade A is the finest and longest. Grades B and C are progressively coarser and shorter. That grade is the single biggest factor in whether a sweater holds up over years of wear — or pills into a fuzzy version of itself after a season.
Cashmere comes from the soft undercoat of cashmere goats, combed by hand once a year. The finest fiber — thin enough and long enough to spin into a dense, stable yarn — is relatively scarce. The coarser, shorter fiber that makes up the rest of the harvest is cheaper to source and much faster to process at scale.
That's where the $50 sweater comes from. It's technically cashmere. The fiber composition label is accurate. But it's made from lower-grade fiber that produces a looser yarn with more exposed fiber ends — and those exposed ends are what pill. Within a season of regular wear, the surface starts to break down. The sweater doesn't fail catastrophically; it just slowly becomes something you stop reaching for.
Premium contemporary brands at the accessible end of the market — the kind of sweater that retails in the $150–300 range — typically use mid-grade cashmere. It's a real step up from the $50 version: finer fiber, better construction, and it will last several seasons rather than one. But it's still not the same material as what the best cashmere houses produce.
The difference becomes clearest around year two or three. A mid-grade sweater has usually started to thin at the elbows and pill across the chest by then. A sweater made from the finest cashmere fiber — the kind used by mills like Barrie (women's · men's) in Scotland or Brunello Cucinelli (women's · men's) in Italy — is typically in better condition at year five than the mid-grade piece was at year two. The fiber is denser, holds its structure, and doesn't shed the same way.
The finest cashmere fiber runs between 14 and 15.5 microns in diameter — a micron being one millionth of a meter, which is a useful way of saying: very fine. Coarser commercial-grade fiber runs 17 to 19 microns. The difference isn't something you'd notice by feel on day one. It shows up over time in how the fabric holds together.
Finer fiber packs more tightly when spun into yarn, which means fewer loose ends at the surface and less pilling. Longer fiber anchors better within the yarn structure, which means the sweater keeps its shape rather than stretching out or going slack at the elbows and hem. The best cashmere brands — Loro Piana (women's · men's) being the clearest example — source fiber at the finest end of this range and set their own internal standards above the industry minimum. The retail price reflects that sourcing cost. But the garment also lasts a decade or more.
A sweater made from the finest cashmere fiber doesn't become a worse sweater when it changes hands. The fiber grade doesn't depreciate. The construction doesn't change. What changes is the price — which on the secondhand market can put a genuinely top-tier cashmere sweater in the same range as a new mid-grade one from a premium contemporary brand.
That's the actual value proposition. Not a bargain on a name. A different tier of object, accessible at a price point that otherwise wouldn't reach it.