What Is Yarn Made Of? From Silk Cocoon to Skein 🧵✨

Yarn is made of fibre — and almost every fibre begins as something grown, gathered, or reclaimed. Plant fibres come from seed, stem, or leaf. Animal fibres come from fleece, hair, or the cocoon of a silkworm. Synthetic fibres are extruded from petrochemicals. Whatever the origin, the fibre is cleaned, aligned, and twisted into a continuous strand we can knit, crochet, weave, or spin. This guide walks the full path from raw fibre to finished skein — and then slows down at the most luxurious stop on the route: silk.

🧵 Fibres and Yarns: The Two Families

Understanding yarn starts with separating fibre from yarn — the words get used interchangeably, and they are not the same thing. Fibres are the individual hair-like strands. They are short (staple) or long (filament). Yarn is what you get when fibres are spun — drafted, overlapped, and twisted — into a single usable thread.

🪛 From Fibre to Yarn: How Spinning Works

Spinning is the step that turns fibre into yarn, and it happens in four broad movements.

✨ The Silk Chapter: From Cocoon to Skein

Silk is the only natural continuous filament fibre. Where cotton and wool arrive as short staple fibres that must be twisted together for strength, a single silk filament can run hundreds of metres without a break. That is why silk yarn feels smooth against the skin and catches light like nothing else in the fibre basket.

🥋 Step 1: Harvesting the Cocoon

A silkworm spins its cocoon from a single continuous thread of silk protein, wrapped around itself in overlapping figure-eights. How it is harvested determines what kind of silk you get.

💧 Step 2: Degumming

Raw silk filament is coated in sericin, a gummy protein that holds the cocoon together. To make silk soft, workable, and spinnable, the sericin is removed by simmering the cocoons — a process called degumming. What remains is fibroin: pure, glossy, strong silk fibre. Degummed silk is what you find sold as cocoon sheets and spinning fibre for makers who want to draft and spin silk themselves.

🪛 Step 3: Combing and Spinning

Reeled filament can be thrown and plied directly into smooth yarn. Shorter silk fibres and opened cocoons are combed to align the strands, then spun — sometimes as singles, sometimes plied two or three times — into yarn with structure and bounce. Combed silk yarns spin up fine, even, and strong: ideal for lace and delicate drape.

🎨 Step 4: Dyeing and Finishing

Finally comes colour: natural and undyed, or dyed in small batches where the depth and shimmer of silk come into their own. Recycled sari silk takes the story a step further — fabric remnants from the sari industry are torn into ribbon, twisted, and spun back into yarn, so every skein carries a one-of-a-kind multicolour character and keeps textile waste in circulation.

🧵 Why Silk Yarn Feels Different to Work With

📌 Choosing the Right Silk Yarn for Your Project

🚀 From Cocoon to Skein: Your Next Step

Every skein tells a story that starts long before the yarn shop. It begins with a plant, a fleece, or — most beautifully of all — a single silkworm wrapping itself in one unbroken thread of protein. Degumming makes it soft. Combing makes it orderly. Spinning gives it strength. Dyeing gives it voice.

Now that you know what yarn is made of, the choosing gets easier and far more fun. Pick a fibre for the way it drapes, breathes, and wears — and for the maker it came from. Start with a small skein of silk, hold it to the light, and let the material tell you what it wants to become.