How to Tell If Cashmere Is Actually High Quality

Why Cashmere Quality Varies So Much

Walk into any department store and you will find cashmere sweaters priced anywhere from $50 to $500. The word "cashmere" on a label tells you the fiber type, but it says nothing about quality. A $50 cashmere sweater and a $300 one are made from the same animal — the difference lies in which fibers were selected and how they were processed.

Understanding these differences takes about five minutes and will save you from spending good money on cashmere that pills, stretches, and loses its shape within a season.

1. Fiber Diameter

The most important quality indicator is fiber fineness, measured in microns. Premium cashmere fibers measure between 14 and 15.5 microns — roughly one-fifth the width of a human hair. These ultra-fine fibers create that unmistakable soft hand feel that sets cashmere apart from every other natural fiber.

Budget cashmere often uses fibers in the 19-micron range. They are still technically cashmere, but noticeably coarser and less comfortable against bare skin. Most brands do not disclose fiber diameter, but the difference is immediately apparent when you touch the fabric.

2. Fiber Length

Longer cashmere fibers (34mm or more) produce a smoother yarn with fewer loose ends. The result is a sweater that pills significantly less over time and maintains a clean surface appearance. Short-fiber cashmere creates a fuzzy yarn that starts pilling almost immediately, even when the sweater is brand new.

This is one of the biggest differences between premium and budget cashmere, and unfortunately, it is not something visible in a product photo. Brands that invest in long-fiber cashmere usually mention it in their product descriptions or brand story.

3. Ply Count

Ply refers to how many individual yarn strands are twisted together before knitting. Single-ply cashmere is lightweight and affordable, but it is thinner and more prone to developing holes. Two-ply is the standard for a durable, everyday sweater. Three-ply and four-ply create progressively warmer and denser garments suited to cold climates.

A good rule: never buy single-ply cashmere expecting it to last more than a couple of seasons. If durability matters, start with two-ply.

4. Knit Gauge

Hold a cashmere sweater up to a light source. If you can see through it easily, the knit gauge is loose. A tighter gauge — more stitches per inch — produces a denser fabric that holds its shape better, pills less, and lasts significantly longer.

Loose-gauge cashmere is cheaper to produce because it uses less yarn per garment. It feels lofty and soft initially, but it is far less durable and far more prone to snagging and stretching.

5. Construction Details

Look at the seams. Fully fashioned cashmere sweaters are knitted to shape — each piece is formed on the knitting machine to match the final pattern. You can identify this by looking for a small chain of loops along the seam line. Cut-and-sew sweaters are cut from flat panels of knitted fabric, which is cheaper but produces a less refined fit and can unravel at cut edges over time.

Also check the ribbing at the cuffs, collar, and hem. It should be tight and springy, returning to its original shape when stretched. Limp ribbing indicates lower yarn tension or lower quality elastic recovery in the fiber.

The Bottom Line

Quality cashmere is not about brand names or price tags — it is about fiber selection and construction. A well-made cashmere sweater from a smaller brand can outperform a poorly made one from a luxury house. Focus on what you can see and feel: softness, density, construction, and the brand's willingness to talk about their fiber sourcing.