This particular pattern did not call to be lined, however most skirts such as this would probably benefit from a lining. In this case, the fabric is a beautiful soft lightweight 100% wool. I did not hesitate to line it with 100% silk. Yes, it takes almost twice as long to line but well worth it. Remember, when you sit down in a wool skirt, the fibers get stretched and they don't return to normal easily. The result will be that you are going to have a butt print in your skirt if you have to sit down for any length of time. In addition, a nice quality lining provides body and form to your garment. My second piece of advice is to use sew in interfacing. It's always the quality way to go when sewing.