How to fix a cracked seam in a down jacket at home?

To repair a down jacket that is leaking down, first shake the feathers out of the hole. Then sew over the torn seam using small, tight stitches and strong polyester thread. If the fabric is weak, you can apply a self-adhesive down jacket repair patch to the inside or outside. If the seam is very torn or the down has already been lost, you should take the jacket to a tailor for professional repair.