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Posted on November 03 2019



Interlock, interlock knit, double-knit, double-jersey, cotton interlock, interlock jersey…These are all terms you may have heard before to describe interlock knit fabric but have you ever wondered what ‘interlock’ actually is? If you’re nodding your head, you’re not alone. Even seasoned sewists will often scratch their heads; unsure what kind of textile it is.

At first glance interlock reminds of a thick jersey and they are in fact closely related as they both belong to the family of knit fabrics. Because of the way knit fabrics are constructed (as opposed to woven fabrics), most knits (but not all) typically have some stretch.

The main difference between interlock knit and regular single jerseys stems from the way interlock knit is being constructed.

The wales of the fabric on each side are alternated, with the back loops knitted together. This can create the impression that the fabric is comprised of two layers, which is why it is referred to as a double-knit fabric. It also gives the fabric two smooth or ‘right’ sides that will look and feel the same (meaning you can use both sides of the fabric as the outer/visible fabric).


Cotton interlock knit is super soft to touch and has a good amount of natural stretch without any added spandex (also known as elastane or lycra). This makes it an eco-friendly choice of material for dressmakers who prefer to work with natural fibres. Better yet, at Fabric Romance you can get your hands on interlock knit made from organically grown cotton. Double win!

Interlock knit is slightly thicker and more stable than other knits and it doesn’t curl at the edges making cutting and sewing with this material a joy. If you are new to sewing with knits, interlock is a great starting point.

Interlock knit is incredibly soft (can't stress this enough) with a high quality feel. If you don’t believe me, I encourage you to order a sample and feel for yourself. Be warned though, you will probably want your entire wardrobe (and maybe even your bed sheets) made of it!

It is an ideal material for making tops, t-shirts, skirts, dresses, pyjamas, children and baby clothing (serious snuggle factor), baby blankets and more!

Organic Cotton Interlock Knit in Bordeaux.
Pattern: Kyoto Sweater by Papercut Patterns

So there you have it. No more interlock knit mysteries. If you’re all geared up to have a go at this material of dreams, have a browse in our shop where you will find a variety of organic melange cotton interlock knits and matching cuff ribbing.


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