Here's my first attempt at sewing jersey fabric, and what a performance I've had with my sewing machine. It's been skipping stitches and all sorts of stuff. I had to walk away from it for a few days and then come back to it with a clear head. Now it seems ok! Maybe it was my tension that needed adjusting and not the sewing machines? I made this skirt with a blue maternity top and a slightly short vest. I've always had a problem with vests being too short after a couple of washes (I'm nearly 5'8") and have just recently discovered that if I buy tops for tall people I don't have this problem. Genius!!! Anyway, back to the ReStyle. So I cut off the straps and the frill edging from around the top and straightened up the edge a bit, where it was shaped for boobs. Then I cut the brown vest in half, and used the bottom half of the vest. I turned the skirt inside out and left the vest the right way around. I hope you're still with me here. Then I made a loose row of stitches around the top of the blue part and gathered it together, until it was the same width as the brown piece. Then I pinned the two cut edges of both pieces together so that the original hem of the brown vest became the bottom of the yoga waist band and sewed them together using zig zag stitch. Now the skirt has an adjustable yoga waist band. There's a couple of good tutorials on the internet for this as well if you fancied making one.