What Is Worsted Wool? Worsted vs Woolen Explained

Worsted wool is the fabric of almost every business suit, and woolen wool is the fabric of flannel and tweed. Both start as the same raw fleece. The difference lies in how the fibers are prepared before spinning, and that one step changes how the fabric looks, feels, wears and keeps you warm. The name worsted comes from Worstead, a village in Norfolk, England, that was once a center of the wool weaving trade.

What is worsted wool?

Worsted wool is wool yarn made from long fibers that have been carded and then combed so they lie parallel before spinning. Combing removes the short fibers, called noils, and leaves a smooth rope of long, aligned fiber called top. The top is drawn out thinner and more evenly, then spun with a relatively high twist into a yarn that is smooth, even and strong. For suiting, two of these yarns are often twisted together into a two-ply yarn for extra strength.

Woven up, worsted yarn gives a fabric with a clean surface and a clearly visible weave: you can see the diagonal of a twill or the grid of a plain weave. It feels smooth and dry, takes a sharp crease, resists pilling and sheds dust. Because the yarns are compact, a worsted fabric has clear gaps between them and breathes well for its weight.

What is woolen wool?

Woolen wool is wool yarn made from fibers that have been carded but not combed. Carding opens and mixes the fibers into a thin web but leaves them pointing in every direction. The web is divided into narrow strands, which are spun with less twist. The result is a fuzzy, lofty yarn full of trapped air.

Woolen fabrics are often milled (fulled) after weaving: washed and worked so the fibers shrink and felt slightly together. Milling, sometimes followed by brushing, raises a soft surface, or nap, that hides the weave. That is why a woolen flannel looks almost like fine felt, and why woolens feel soft, warm and springy.

Worsted vs woolen: the differences

The differences run from the fiber all the way to the finished suit.

Is worsted wool good for suits?

Yes. Worsted wool is the best all-round fabric for suits and the default for business and formal tailoring. Its smooth surface looks sharp, its strength survives daily sitting and commuting, and it takes a trouser crease that lasts. In the right weight it works in every season: 7 to 9 oz (220 to 280 g) for heat, 9 to 11 oz (280 to 340 g) for year-round wear and 12 oz (370 g) and up for cold weather.

Most fine worsted suiting also carries a Super number, which tells you how fine the fibers are. That is a separate question from worsted or woolen; see Super numbers explained.

Is flannel worsted or woolen?

Flannel can be either. Traditional flannel is woolen: carded yarn, woven and then milled and brushed until the surface is soft and the weave all but disappears. Worsted flannel uses worsted yarn and is milled more lightly, so it has a flannel look and feel but is smoother, crisper and usually lighter.

Tweed and other woolen fabrics

Tweed is the best-known woolen fabric: rough, textured, often flecked or patterned, and woven from coarser wool, traditionally in Scotland and Ireland. The most famous, Harris Tweed, must by Act of Parliament be handwoven by islanders in their homes in the Outer Hebrides. Tweed is warm and very hard-wearing, and it suits sport coats and country suits better than city business wear; see suit jacket vs blazer vs sport coat.

• Saxony: a soft woolen made from fine merino-type wool, with a gentle nap. Used for suits and jackets.
• Cheviot: a firmer, rougher tweed made from the wool of Cheviot sheep.
• Donegal tweed: a tweed with small colored flecks scattered through it, named after County Donegal in Ireland.
• Melton: a dense, heavily milled woolen used for overcoats and for the undersides of tailored jacket collars.

Common worsted suit fabrics

Most of what you see in a business fabric book is worsted. These are the main types.

Fresco is a mill's trade name that has become shorthand for the whole family of open, high-twist worsteds. They are among the most useful fabrics for heat; see the best suit fabric for hot weather.

What does 100% worsted wool mean?

A label reading 100% worsted wool tells you two things: the fabric is all wool, and the yarn was worsted spun. It does not tell you the weight, the Super number, the weave or how the garment was made. A light tropical and a heavy winter serge can both be 100% worsted wool. Read it as a good sign, then check the weight and the construction.

Worsted or woolen: which should you choose?

Choose by what the suit has to do. Worsted wins for business, travel and heat; woolen wins for winter warmth and texture.

If you are buying one suit, make it worsted. If you live somewhere with real winters, add a woolen flannel as your second or third suit: a mid-gray flannel is one of the most useful cold-weather suits there is, and it works with the same shirts and ties as your worsteds.

The tailor's view

Tailors handle the two very differently. Woolen fabrics are forgiving: they shrink and stretch readily under a hot iron, so a tailor can mold them into shape, and their soft surface hides stitching and small flaws. Smooth worsteds show everything, from a slightly uneven seam to an iron mark, so they demand precise pressing. That is one reason a beautifully finished worsted suit is a good test of a tailor's skill.

Ask about trousers in particular. Woolen flannel trousers are wonderfully warm, but they bag at the knee and wear at the seat and inner thighs, so an extra pair is sensible. Worsted trousers keep their crease and shape longer between pressings. Either way, regular rest on a hanger and occasional pressing keep them looking right; see how to care for a suit.

Worsted for work, woolen for warmth and texture: that is the short version. For every other fiber and weave, see suit fabrics explained.

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