Interlining is a subject that caused me a lot of distress when I was first approaching this business of sewing a tailored coat. But it all boils down to just two major things you need to figure out: 1) what kind of interlining to use and 2) how to attach it.
To figure out which type of interlining to use, I took a swatch to the store with me and tried layering it with a couple different options. I opted for lambswool, which is very warm and will keep me from freezing as I walk back and forth to the subway each day. Next, I decided to attach my lambswool interlining to my lining pieces and then sew them all together as one, which is the method my tailoring book recommended and it made the most sense to me. Watch as I demonstrate each step in this video!