, also called Double-knit Jersey: It's Knitted with two needles, like two layers of single jersey together. When is plain, its texture is smooth on both sides. And, it also has variations, like rib and pique knits.
Interlock is a bit heavier, firmer, and sturdier, with a 2 way stretch. Making it better for garments that need stretchiness and structure such as looser fitting sweats, dresses, rompers, dresses, skirts and pants.
In general, it feels thicker and cozy, which also makes it a good alternative to woven fabrics.
It’s more stable than single jersey, which means it doesn’t stretch out of shape easily and unlike jersey, Interlock edges does not curl, which makes it popular for free cur and laser cut garments. And its ability to lie flat suits the needs of homeware projects.