Guide to Cashmere Sweater Manufacturing: From Yarn to Finished Product

There's something almost magical about a well-made cashmere sweater—the way it feels against bare skin, how it seems to warm you without weight, how it holds its shape after years of wear. What most people don't realize is just how complex and labor-intensive the journey from raw fiber to finished garment really is.

We run this process every day. Let me walk you through it.

Step 1: Raw Fiber Sourcing

It all starts with the goats. Cashmere fiber is harvested once a year during the spring molting season, when goats naturally shed their soft undercoat. The fiber is combed (not sheared) from the animal, then sorted to separate the fine undercoat from the coarser guard hairs.

The quality of this raw fiber depends on three things:

• Fineness (micron count): Premium cashmere measures under 15.5 microns. The finer, the softer.

• Length: Longer fibers spin into stronger, smoother yarn with less pilling down the line.

• Color: Natural fiber colors range from white to grey to brown. White fiber is most valuable because it can be dyed into any color without bleaching.

Most of the world's finest cashmere still comes from Mongolia and Inner Mongolia, where the extreme cold winters produce a finer, denser undercoat. We source from certified suppliers in this region, and we verify fiber specs on every incoming lot.

Step 2: De-hairing and Washing

Raw cashmere contains dirt, grease, and coarse guard hairs. Before it can become yarn, it needs to be cleaned—a process called de-hairing and washing.

This involves:

• Washing in lukewarm water with mild detergents

• Mechanical or manual removal of remaining guard hairs

• Drying to bring the fiber to optimal moisture content

The water quality and detergent used here matter more than most buyers realize. Poor washing can leave residue that affects dye uptake and, more importantly, triggers skin sensitivity in finished garments. This is one of the reasons OEKO-TEX certification is so important—it tests the finished product for exactly these kinds of chemical residues.

Step 3: Yarn Spinning

Clean fiber goes to the spinning mill, where it's processed into yarn. There are two main spinning methods:

Ring spinning produces a stronger, smoother yarn with good stitch definition—ideal for fine gauge cashmere knitwear.

Open-end spinning is faster and more economical, producing a softer, bulkier yarn better suited to chunky knits.

For our production, we primarily work with ring-spun 2-ply yarn. The two-ply construction (two strands twisted together) gives the yarn more strength and consistency than single-ply, which matters significantly for garment longevity.

At this stage, you can also choose:

• 2-ply vs. 4-ply: Higher ply = thicker, more luxurious fabric. 4-ply is typically used for heavy winter sweaters and blankets.

• Machine washable treatments: A special enzymatic treatment can make cashmere machine washable without damaging the fiber. Ask your manufacturer about this if your retail line needs easy-care properties.

Step 4: Dyeing

Dyeing can happen at the yarn stage (yarn-dyed) or at the fabric stage (piece-dyed). Yarn-dyed cashmere tends to have deeper, more consistent color, while piece-dyeing offers more flexibility for color changes and is generally more cost-effective.

Natural and organic dyes are gaining popularity, particularly for brands with sustainability positioning—but they require longer processing times and more stringent quality control. If you're sourcing for a GOTS-certified collection, the dyeing stage is where you'll need to pay close attention to which dyes and chemicals are permitted.

We have relationships with dyehouses that can accommodate both conventional and low-impact dyeing methods, depending on your certification requirements.

Step 5: Knitting

This is where the sweater actually starts to take shape. At WFS Cashmere, we run full-fashion knitting machines across multiple gauge ranges—from 3-gauge (chunky, heavy knits) to 18-gauge (ultra-fine, lightweight knits).

Gauge matters enormously:

• 3GG–5GG: Chunky knits, heavy sweaters, coats, outerwear

• 7GG–9GG: Medium-weight sweaters, the sweet spot for most casual cashmere collections

• 12GG–18GG: Fine gauge, lightweight tops, layering pieces

Each gauge requires its own machine setup, and not all manufacturers can cover the full range. One of our competitive advantages is exactly this: we can produce from 3-gauge through 18-gauge in the same facility, which gives our brand clients much more design flexibility.

Step 6: Linking and Finishing

Once the knitted panels are complete, they need to be assembled. This involves:

• Linking: Hand-stitching shoulder and side seams to maintain the seamless look and feel

• Drop-needle and intarsia: For specific pattern work

• Brushing: Some styles get a brushing treatment to raise the surface fiber for a softer hand-feel

• Fulling/Washing: A controlled washing process that compacts the fabric and improves handle

Every step in finishing affects the final quality. We inspect every piece at multiple checkpoints before it moves to packaging.

Step 7: Quality Control and Packaging

We operate a multi-stage QC process:

1. In-line inspection during knitting

2. Pre-assembly inspection of panels

3. Final inspection of finished garment

4. Optional: Pre-shipment inspection by third-party QC services (SGS, Bureau Veritas, etc.)

For packaging, we offer standard options as well as fully custom solutions—custom labels, hang tags, branded packaging, and retail-ready folding. Many of our brand clients use the private label service to create a complete unboxing experience.

Step 8: Shipping

Our standard delivery terms are FOB Qingdao Port, and we work with trusted freight partners to arrange sea or air freight to your destination. Lead times range from 15 working days for in-stock yarn/color options up to 3 months for fully custom production runs.

What This Means for Your Brand

Understanding the manufacturing process isn't just interesting trivia—it's practical knowledge that helps you make better decisions when sourcing.

When you're evaluating a cashmere sweater manufacturer, ask specifically about:

• Their gauge range and whether they can produce your target styles in-house

• Their fiber sourcing relationships and certification portfolio

• Their minimum order quantity and what affects it

• Their quality control process and whether they offer third-party inspection

• Their lead time for your specific product type

If you'd like to see our production capabilities in person, we regularly exhibit at Fashion Access Hong Kong, Intertextile Shanghai, and Première Vision Paris. You can also contact us directly to discuss your production requirements.

David Si is the CEO of WFS Cashmere Industry Co., Ltd., a vertically integrated cashmere and natural fiber knitwear manufacturer based in Shandong, China. With annual capacity exceeding 600,000 pieces and full gauge capabilities from 3-needle to 18-needle, WFS supplies international brands through OEM and ODM partnerships. Get in touch to start your cashmere production.