No, pattern -- just garter stitch. I have tried holding the two together, but I find the netting twists into a skinny strand and gets lost behind the cotton one, so I try to somewhat wrap it around the yarn as I work it through.
The hardest part for me is when I knit normally, I end up frequently poking the tip of my needle through one of the holes and tearing the netting. I'm trying to knit looser (I'm normally a pretty snug, but not tight, knitter) and it just looks uneven and sloppy to me.
I haven't washed my one loose sample yet; maybe the stitches will straighten out when I do. I need to make another one so that I can have one to try out.