Reference · Updated April 2026

Yarn Fibre Types Complete Guide: Every Fibre Explained for Crochet

Every yarn fibre has measurable properties — warmth, drape, durability, washability, breathability, cost. Choosing the right fibre for a project is as important as choosing the right weight. This guide groups all common crochet fibres into three categories (animal, plant, synthetic), compares their properties side by side, and recommends the best projects for each.

By Kelley Delano, Editor & Lead Author · Published 3 Feb 2026 · Updated 24 Apr 2026 · 10 min read

🎯 Key takeaway

Three fibre categories: animal (wool, alpaca, silk, cashmere — warm, breathable, often felt-able, varying drape), plant (cotton, bamboo, linen, hemp — cool, breathable, inelastic, durable), and synthetic (acrylic, nylon, polyester — durable, machine-washable, affordable, less breathable). Best blanket yarn: acrylic for everyday use, wool for warm winter use. Best garment yarn: wool or wool blends for drape; cotton for summer wear. Best amigurumi yarn: acrylic for smoothness and durability.

Animal fibres

Wool

The classic crochet fibre. Made from sheep fleece — sometimes specifically from breeds like Merino (very soft), Bluefaced Leicester (durable + lustrous), or Shetland (rustic + warm). Wool is naturally warm (insulates even when slightly damp), slightly stretchy, takes dye beautifully, and felts when agitated with hot water. Best for: warm sweaters, winter hats and mittens, traditional Aran cables, blankets that prioritise warmth over washability. Avoid for: summer wear, items needing machine-washing (unless explicitly superwash wool), gifts to people with wool allergies.

Alpaca

Softer than most wools, with less crimp and more drape. Alpaca is 5-7 times warmer than wool by weight (per Alpaca Owners Association data), which makes it ideal for very warm garments or accessories. Drapes better than wool, but has less elasticity — alpaca sweaters can stretch out over time and not bounce back. Best for: cosy scarves and shawls, drapey cardigans, gift items where softness against skin matters. Avoid for: structural items (baskets, baby blankets that need to hold shape), highly active wear that will stretch the fabric.

Silk

Luxurious, lustrous, expensive. Pure silk has beautiful drape and a soft sheen but is inelastic and requires careful care (hand wash, lay flat). Most "silk" yarn used in crochet is silk-blend (silk + wool, silk + cotton) which combines silk's beauty with the practical handling of the other fibre. Best for: heirloom shawls, formal evening wraps, premium gift items. Avoid for: everyday wear, high-friction items, projects requiring machine wash.

Cashmere, mohair, qiviut

Premium specialty animal fibres. Cashmere (from cashmere goats) is exceptionally soft and warm; mohair (from Angora goats) has a fuzzy halo; qiviut (from musk ox) is the warmest and most expensive natural fibre on the market. All used primarily for high-end accessories where the fibre cost is justified by the result.

Plant fibres

Cotton

The most popular plant fibre for crochet after acrylic. Cool to the touch, breathable, inelastic (cotton doesn't stretch back like wool does), very durable. Mercerised cotton has been chemically treated for extra strength and sheen; non-mercerised cotton is softer and matte. Best for: summer garments, dishcloths, market bags, washcloths, baby items that need frequent washing. Cotton is also the standard for doilies and traditional thread crochet. Avoid for: items needing warmth, garments needing stretch (cotton sweaters lose shape over time), amigurumi where firm structure matters (cotton is heavier and stiffer than acrylic).

Bamboo (rayon from bamboo)

Technically a semi-synthetic — the bamboo fibre is dissolved and re-spun. Marketed as "natural" but processed industrially. Very soft, drapey, cooling against skin, antibacterial properties. Often blended with cotton or silk. Best for: summer tops, shawls, lightweight accessories, baby items. Avoid for: structural items (too drapey), heavy-wear items (less durable than cotton).

Linen

From flax plants. Very strong, very cool, gets softer with each wash. Traditional fibre for kitchen towels, formal table linens, and summer wear. Best for: summer garments (it's the coolest fibre available), kitchen linens, market bags, items that need to be durable over decades. Avoid for: anything needing warmth, drapey shawls (linen has stiff hand initially), amigurumi.

Hemp, ramie, jute

Specialty plant fibres used for ultra-durable rustic items — rugs, baskets, garden bags. Stiff hand, rough texture, exceptional strength. Rarely used for wearable garments because of the coarse feel.

Synthetic fibres

Acrylic

The workhorse of modern crochet — affordable, durable, machine-washable, comes in every colour imaginable. Lacks the breathability of natural fibres and pills over time, but the convenience for everyday items is unmatched. Best for: everyday blankets, baby items, amigurumi, kids' clothes, charity projects, learning yarn (forgiving for beginners, cheap to practise with). Brands: Red Heart Super Saver, Caron Simply Soft, Bernat Super Value, Lion Brand Vanna's Choice. Avoid for: summer wear (less breathable), high-end gift items where natural fibre signals quality, formal garments where drape matters.

Nylon

Strong, abrasion-resistant, often added to wool socks (Patons Kroy is wool/nylon) to extend wear life. Pure nylon yarn is uncommon; nylon-blend is widespread in sock yarns and any high-wear application. Best for: sock heel/toe reinforcement (held together with wool yarn), bags and accessories needing extra durability.

Polyester

Newer to the yarn world. Used in chenille yarns (Bernat Blanket, Bernat Velvet) for super-soft, super-bulky blankets. Very plush hand but extremely slippery — splits while you crochet, slides off hooks, and requires patience. Best for: chenille blankets specifically, plush amigurumi for very young children (sensory toys). Avoid for: detailed stitch patterns (texture disappears in the plush), beginners (extremely frustrating).

Side-by-side fibre comparison

Fibre	Warmth	Drape	Elasticity	Durability	Wash	Cost
Wool	High	Med	High	High	Hand/special	$$
Alpaca	Very high	High	Low	Med	Hand	$$$
Silk	Med	High	Low	Med	Hand only	$$$$
Cotton	Low	Low	Low	High	Machine	$$
Bamboo	Low	High	Low	Med	Gentle machine	$$
Linen	Very low	Low	Very low	Very high	Machine	$$$
Acrylic	Med	Med	Med	High	Machine + tumble	$
Polyester (chenille)	Med	Very high	Low	Med	Machine	$$

How to choose the right fibre for a project

Match the fibre to the use case:

Baby blanket: machine-washable, soft, durable. Acrylic or cotton-acrylic blend. Avoid wool (washing requirements too high for parents) and pure cotton (heavy when wet, slow drying).
Winter sweater: warm, drapey, slightly stretchy. Wool or wool blend. Superwash wool if recipient won't hand-wash.
Summer tank top: cool, breathable, drapey. Cotton, bamboo, or linen blend.
Amigurumi: dense, smooth, holds stuffing, holds shape. Acrylic worsted is the standard.
Dishcloth: absorbent, durable, machine-washable. 100% cotton, worsted weight.
Heirloom shawl: beautiful drape, special-occasion fibre. Silk blend, alpaca, or merino.
Socks: warm, slightly stretchy, durable at heel/toe. Wool-nylon blend (Patons Kroy, Knit Picks Stroll).
Market bag: strong, washable, holds shape. 100% cotton or hemp.

Why blends exist

Pure fibres each have weaknesses. Blends combine fibres to mitigate weaknesses while preserving strengths:

Wool/acrylic blend (75/25 or 80/20): warmth of wool with washability of acrylic. The workhorse blend for "warm" everyday items.
Cotton/acrylic blend: drape of cotton with the bounce of acrylic. Standard for baby items.
Wool/silk blend (70/30): warmth and slight elasticity of wool with the sheen and drape of silk. Premium shawl fibre.
Cotton/linen blend: softness of cotton with the cooling and durability of linen. Summer-garment specialty blend.
Merino/cashmere/nylon blend (often 80/10/10): softness of merino, luxury of cashmere, durability of nylon for sock yarn.

The blend ratio matters. Trace amounts of a luxury fibre (5% cashmere in a wool yarn) provide more marketing than performance benefit. Functional blends typically have at least 15-20% of the secondary fibre.

Frequently asked

Direct answers.

What's the difference between animal, plant, and synthetic fibres?

Animal fibres (wool, alpaca, silk) come from animals — warmest, often breathable, may felt with agitation. Plant fibres (cotton, bamboo, linen) come from plants — cool, breathable, inelastic. Synthetic fibres (acrylic, nylon, polyester) are manufactured — durable, often machine-washable, affordable, less breathable. Each category has different care requirements and project suitability.

What's the best yarn fibre for beginners?

Acrylic, hands down. It's affordable enough to practise with, durable enough that beginner-quality fabric still looks reasonable, machine-washable, comes in every colour, and forgiving of inconsistent tension. Red Heart Super Saver and Caron Simply Soft are the most-recommended beginner yarns globally. Switch to natural fibres once your skills justify the cost difference.

Is wool warmer than alpaca?

Alpaca is warmer than wool by weight — about 5-7 times warmer per gram. But the perceived warmth of a garment depends on density and weave: a thick wool sweater can be warmer than a thin alpaca sweater because there's more fibre. For maximum warmth per skein, alpaca wins. For maximum warmth per dollar, wool wins.

Can I use cotton for amigurumi?

Yes, but with trade-offs. Cotton produces firmer, heavier amigurumi than acrylic. The shape definition is excellent, but the items feel weighty and the stitch tension is more demanding. Cotton works well for amigurumi displayed as decor (where weight doesn't matter) and for amigurumi that needs to be washed frequently (cotton machine-washes more reliably than acrylic). For typical play-toy amigurumi, acrylic is the standard choice.

Why are some yarns so expensive?

Fibre cost varies dramatically: acrylic raw material is pennies per pound; merino wool is several dollars per pound; cashmere is hundreds of dollars per pound; qiviut is over a thousand dollars per pound. Production scale also matters — mass-produced acrylic skeins benefit from huge economies of scale; indie-dyed luxury fibres are produced in small batches with labour-intensive techniques. Premium yarns reflect both the raw fibre cost and the artisanal production process.

What's a 'blend' and why use one?

A blend is yarn made from two or more different fibres combined during spinning. Common examples: 75% acrylic / 25% wool (warmth of wool, washability of acrylic), 50% cotton / 50% bamboo (drape + breathability), 80% merino / 20% silk (warmth + sheen). Blends combine the strengths of multiple fibres while mitigating individual weaknesses. The ratio matters — trace amounts (under 15%) of a luxury fibre often provide more marketing benefit than real performance change.

Sources & further reading

Craft Yarn Council — Standard Yarn Weight System
Crochet Guild of America (CGOA) — professional standards
Edie Eckman, The Crochet Answer Book (Storey Publishing) — technique reference
Clara Parkes, The Knitter's Book of Yarn (Potter Craft) — fibre properties

Craft Yarn Council — Yarn Fibre Reference

Clara Parkes, The Knitter's Book of Yarn (Potter Craft) — fibre property reference

Kelley Delano

Editor & Lead Author

Kelley is the editor and lead author at Crochet Calc. She works across the site's calculator math, reference articles, and editorial standards, focused on making professional-grade project planning accessible to crocheters at every skill level.

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