Flat Felled Seam Tutorial^ One of my favorite seam finishes is the flat felled seam. This seam is primarily used in outerwear and jean construction. The #zwargoskirt is detailed with flat felled seams. In my opinion, it’s probably one of best seams for any attempt of weatherproofing your outwear. It’s similar to a French seams but has slightly different detailing as shown in this tutorial. It really comes down to construction preference. It’s made by encasing one seam allowance with the other se