Tailor install zippers in all types of coats, including leather. If your zipper does not work, there may be two options. Most of the time the zipper itself is damaged and will need to be replaced. Occasionally, the zipper is in tact and the problem is the zipper pull. If this is the case, we can usually replace the pull for a lesser charge. Tailors mends tears in leather coats, or replaces knit cuffs. Tailors sew patches onto letter jackets.