1. Cut off the hat part of the hooded sweater with scissors or a cutting knife.

2. Cut a V-shaped notch at the collar with scissors. Pay attention to leave enough space for the zipper to pass through.

3. Remove the zipper and sew it on the V-notch of the sweater neckline with a sewing machine. Pay attention to sew the ends of the zipper and the ends of the sweater together.

4. Finally, sew a piece of cloth with a sewing machine, and sew the edge of the neckline tightly to prevent the edge from loosening.