"Cotton interlock" refers to a type of fabric made from cotton that is knit together with a special stitching technique. It creates a smooth and stretchy material that is comfortable to wear. Full definition
These gorgeous Little Long John PJs are made from super soft and durable organic cotton interlock with a hint of elastane in the rib cuffs and neck for extra stretch, great for wrapping your little one up on those cold nights this season! (welovefrugi.com)
Made of soft cotton interlock with picot stitch trim on a contrasting folded cuff, it's perfect for keeping a new little one cozy. (buybuybaby.com)
needed just one more pajamas made by her mom, I am thrilled to be using this divine organic cotton interlock knit fabric! (diy-crush.com)