Lisle (filo di scozia): what it is and how to spot a good cotton sock

Men’s lisle socks, known in Italy as “filo di scozia”, are a classic of the Italian man’s wardrobe: thin, slightly lustrous, perfect with a suit. But what exactly is lisle? And how can you recognise a good cotton sock, even when the label doesn’t say much?

In this guide we explain how this yarn is made, what makes it different from ordinary cotton and which details to look at when you choose cotton socks for the office, special occasions or every day.

What lisle is

Lisle is not a different fibre from cotton: it is cotton processed in a particular way. The starting point is long-staple cotton, meaning cotton with longer-than-average fibres, which give a more even and stronger yarn.

On this base, a few typical processes are carried out:

• Twisting: two or more threads are twisted together. The yarn becomes more compact and even.
• Gassing: the yarn passes quickly close to a flame that burns off the surface fuzz. The result is a smoother, cleaner yarn.
• Mercerising: a cotton treatment that gives it a soft sheen and brighter colours.

The result is a light sock, smooth to the touch and slightly lustrous, which you can tell apart at a glance next to an ordinary cotton sock.

Why it is so popular with a suit

A lisle sock is thin, so it fits well even in the narrowest dress shoes. Its smooth, slightly lustrous surface goes with suit fabrics and doesn’t look “sporty”. That is why it has always been the sock for ceremonies, the office and anyone who wants a polished look.

With a suit, the rule stays the same: a long sock, so your leg doesn’t show when you sit down, and a colour close to your trousers or shoes. Navy, grey and black are the safest choices.

Lisle and ordinary cotton: the differences in practice

Side by side, a lisle sock and an ordinary cotton sock behave differently. Here is what you usually notice:

• To the touch: lisle is smoother and cooler, ordinary cotton is softer and more “fuzzy”.
• To the eye: lisle has a slight sheen, ordinary cotton is more matt.
• In thickness: lisle is usually thin and light; ordinary cotton ranges from thin to thick, right up to sports socks with terry.
• In use: lisle is designed for suits and dress shoes; ordinary cotton is more versatile and also works with trainers and jeans.

There is no outright winner: it depends on where you wear your socks. For the office and important occasions, fineness counts; for free time, comfort counts.

How to recognise a good cotton sock

Even without lisle, a cotton sock can be excellent. Here is what to look at:

• The composition: read the label. A little elastic fibre helps the sock stay up; cotton should be the main part if you are looking for a cotton sock.
• Combed cotton: this is cotton from which the shorter fibres have been removed. The yarn is more even and the sock smoother.
• The toe: run your finger along the inside. A flat seam is less bothersome in the shoe.
• The cuff: it should hold the sock up without leaving a deep mark on your leg.
• The knit: hold the sock up to the light. An even knit, with no thinner patches, lasts longer.

Our cotton socks for suits and for every day

Our range does not include lisle socks, but you will find several cotton socks designed for the same occasions. Among our men’s dress socks there are styles in combed cotton, thin and with discreet stripes, in colours that are easy to match, such as the striped combed cotton dress socks.

For every day, in our selection of men’s cotton socks you will find short socks, mid-calf socks, sports socks, dress socks and patterned socks, in multipacks. If you often wear a suit, choose a long style that covers your leg even when you sit down.

How to wash thin cotton socks

Thin socks last longer if you treat them with a little care. Follow the label and a few simple rules:

• wash in cold or lukewarm water, with similar colours;
• turn the socks inside out and use a mesh laundry bag;
• let them air-dry, without laying them on the radiator.

That way the cotton stays soft, the colours stay bright and the sock keeps its shape. Whether you choose lisle or a good combed cotton, the details make the difference.