I tried attaching the pattern and the forum told me it was too big. Here's the link: http://www.ravelry.com/patterns/library/criss-cross-13
Oooooh, it's a brioche stitch. Row 15, you knit the first stitch, then bring the yarn to the front and slip the next stitch purl wise. Then you bring your yarn
over the needle (rather than taking it to the back between the needles) and knit the next stitch. You'll have the slipped stitch and a YO on top of each other, plus the knit stitch. Then do it again, bringing the yarn to the front, slipping a stitch, and knitting the next.
Each time you'll have a stitch with another stitch on top of it, plus a plain stitch.
On the return row, you'll just purl that stitch with a stitch on top, then knit the next - all the way across the row.
It looks like you're almost doubling your stitch count on the first row, then reducing it on the second. It makes for a very squishy fabric.