1, sewing
It can be mended with needle and thread, but the needle and thread needed for down jackets is quite special, and a very thin needle is enough. The needle we usually use at home is not acceptable, because the eye of the needle is too thick and it will leak after sewing. If you don't have a fine needle at home or you can't, you can send it to a shop that specializes in repairing down jackets for sewing.
Step 2 Embroidery
You can embroider some unique embroidery where there are gaps in the down jacket. If you can be symmetrical, try to do it on both sides. It feels beautiful and has its own characteristics. If not, you can go to a clothing store to have it repaired, and just tell them what kind of pattern they want.
Step 3 repair
Nowadays, it is a very popular tool for mending clothes. Many people choose their favorite pattern patches when mending clothes. Some need sewing, and this one is more troublesome. Others bring their own glue. Stick it on the crack and then iron it carefully. Generally, it is difficult to tell whether it is burnt or not after using cloth.
Step 4 label
If it is above the down jacket, you can buy a logo that you like, and the size can cover the gap as much as possible. Most people will think that the trademark is there, and it will not be too abrupt. If it is a big brand down jacket, you can consider sending it back to the manufacturer for repair.
5. Cloth of the same color
You can go to a clothing store or sewing shop to find a piece of fabric similar in color and material to the damaged down jacket, sew it at home with a sewing machine, or sew it directly at the sewing shop. This method is very practical, but there will be repair marks after sewing.