Corriedale Wool: The Best All-Round Fibre for Felting

Corriedale is a New Zealand breed made in the 1880s by crossing merino ewes with lincoln and leicester rams. The aim was a dual-purpose sheep — decent meat, decent fleece — and the fleece that resulted sits exactly halfway between fine wool and longwool.

That middle position is why felters keep coming back to it. Nearly every job in the craft wants a compromise between speed, firmness and softness, and corriedale is the compromise.

The numbers

• Micron: 25–31, against 18–22 for merino and 33+ for romney or herdwick.
• Staple length: 8–15 cm — long enough to comb, short enough to card easily.
• Crimp: pronounced and even, which is what makes it springy and quick to tangle.
• Colour: naturally white and clean, so it dyes to bright shades without a grey cast.

Why it needle felts better than merino

Three things, all of them consequences of the extra micron or two.

• It compacts faster. Coarser fibres have deeper scales and more crimp, so the barbs get purchase sooner. A corriedale core reaches firmness noticeably before a merino one.
• It holds an edge. Sculpture depends on being able to make a crease, a nostril or a hard corner and have it stay. Merino relaxes; corriedale stays put.
• It fluffs less. Merino's fine fibres lift into a halo when you work them, which softens exactly the detail you are trying to create.

The practical upshot: build in corriedale, and use merino only where you want a glossy finish or genuine softness. The general comparison across breeds is in best wool for felting.

Where merino still wins

• Anything worn next to skin — scarves, cowls, baby items. See is merino wool itchy.
• Fine wet felting. Thin, translucent fabric and nuno felting both need the finest fibre available, because it migrates through silk more readily.
• Smooth surfaces. A last veil of merino over a corriedale sculpture gives the best of both.
• Colour blending. Merino tops blend more evenly — see how to blend wool colours.

Corriedale for wet felting

It felts perfectly well wet, and it makes a sturdier fabric than merino — thicker, more robust, better at holding a shape. That makes it the sensible choice for bags, bowls, slippers and anything structural.

It shrinks slightly less than merino, roughly 25–30% against 30–40%, which changes your template sizes. If you are working from a pattern written for merino, expect the finished piece to come out a little larger. The arithmetic is in how much wool shrinks when felted.

What to buy

• Corriedale tops — combed, smooth, dyed in a wide range. The default purchase.
• Carded corriedale batts — faster for cores and bulk, and cheaper. Compare with dedicated core wool, which is usually coarser again.
• Corriedale fleece — raw, by the kilo. The cheapest route by a long way if you are willing to wash and card it; the breed is common enough that fleeces are easy to find.
• Merino–corriedale blends — sold by some suppliers as a compromise. Reasonable, but you can achieve the same by layering the two.

Corriedale sock yarn and worsted yarn exist too, and are unrelated to felting unless you intend to knit and then full the result — see felting in knitting.

Working notes

• Expect to spend about a third less time on the core stage than with merino.
• Use a 38 gauge needle for most of the work; 36 only for large cores, 40 for the final surface.
• It takes acid dyes readily and evenly — see dyeing wool roving.
• Undyed corriedale is a good natural cream, so it does not need dyeing for sheep, lambs and anything else that should look like wool. It is the obvious fibre for a needle felted sheep.

The short version

If you make sculpture, buy corriedale and treat merino as a finishing material. If you make wearables, do the reverse. If you are buying your first wool and do not know which you will end up doing, corriedale is the safer 500 grams.