What is single jersey

Short answer: Single jersey is the simplest knit. It has a smooth front and a slightly uneven back, and it is used for most T-shirts and light tops. Once you know it, you also understand why light everyday clothes behave the way they do.

One stitch direction

Single jersey is knitted with stitches that all face the same way. On the front you see small V shapes lying neatly in rows, which gives the smooth surface. On the back you see the loops of the stitches, which give a slightly rougher texture. That is why the two sides differ, and why the fabric has a clear right and wrong side.

Light and stretchy across

The fabric stretches mostly across its width and only a little along its length. That gives natural freedom of movement when you pull a top over your head or bend your arms. At the same time single jersey drapes softly, because the knit is thin and light. The same idea of stretch and drape runs through many knitted items, including bamboo socks.

It curls at the edge

Raw edges in single jersey roll up. The tension in the stitches pulls the edge inwards, both at the hem and at the sides. That is why the edges are always hemmed or finished with a band or a rib trim. If you have ever seen a cut T-shirt curl at the edge, that was single jersey showing its nature.

Where you find single jersey

Single jersey is the most common knit for light everyday clothes. You find it in T-shirts, thin tops and underwear, where low weight and a soft drape matter. It is easy to layer because it adds little bulk. Many knitted products build on the same basic idea, and that includes socks for women.

Elastane adds stretch both ways

Since single jersey only stretches a little lengthwise, elastane is often added. It gives the fabric stretch in both directions and helps it return to its shape after wear. Without elastane, a thin fabric can go slightly baggy at the knees and elbows during the day. With it, the fit holds better from morning to evening.

The smooth side faces out

Normally the smooth front faces outwards, because it looks neatest. The slightly uneven back sits against the skin, and many find it comfortable because it does not cling. Some designs flip the fabric to get a more matte look. Look at the inside of a T-shirt and you can see the difference for yourself.

How to care for single jersey

A thin fabric needs gentle handling. Wash at a low temperature, turn the garment inside out and let it dry flat or on a hanger. Avoid wringing it hard, as that can twist the fabric out of shape. Thin fabric dries quickly, so it does not need a tumble dryer. The same goes for socks for men and women.

Strengths and limits

Single jersey is light, soft and drapes nicely. On the other hand it is fairly thin and can look see through in light colours. It holds its shape a little less well than denser knits, so it needs a bit more care in washing and drying. These are not flaws but qualities of the knit itself.

Frequently asked questions

What is single jersey used for

T-shirts, thin tops and underwear. It is the most common knit for light everyday clothes because it is thin, soft and drapes well.

Why does the edge of single jersey curl

Because the stitches only face one way, and the tension in the fabric pulls the edge inwards when it is not hemmed or finished with a trim.

Is single jersey stretchy

Across the width, yes, but only a little lengthwise. That is why elastane is often added to give stretch in both directions and help it hold its shape.