Tutorial: Twice-Knit Knitting by Megan Mills Twice-knit knitting is an unusual technique. It is remarkable because in addition to having almost no stretch it doesn't ravel. That's right, you can knit a fabric from Twice-knit and cut it, it won't ladder. It is a thick, dense fabric because the stitches are turned 90 degrees to the fabric surface. It feels plush and springy.