Making zippers by hand is a lot of work and can be done faster using machines, although you need to learn some ways to use sex doll before adding zippers to your clothes. It is difficult to remove all the stitches if sewing is not done properly * A dedicated knife is needed for this purpose, but using that knife may also damage your clothes *. When you try, it must be with that neighbor at night, you will learn what I think of sewing machines. I used it to repair some jeans trousers, I put a zipper from one of them, and repaired two shopping bags. Save money. Too convenient to add a zipper to a doll costume. Remove the bottom and cover, re-grease, and clean the bobbin holder. It still works like a breeze, and although sewing is not easy, it takes some time to learn (correct thread tension is important). Good sewing machines are an absolute advantage. (Sadly, I don’t have one.) The skirt is easier to handle sex dolls when the skirt is always zipped. I have a real vintage uniform skirt in Virginia, but the zipper is broken. Paying people to change zippers in the store is too expensive.