BLANKNYC Suede Moto Jacket - Coffee Bean Chestnut Brown Size Small

BLANKNYC Suede Moto Jacket Color - Coffee Bean Condition - Used - I bought this jacket a few years back and I only wore it a few times Defects- The only defect is on the back of the left arm zipper. The zipper doesn't seem to go all the way down. When I fully open the zipper there seems to be some type of green mark. I have no idea what it could be. I posted pictures of the defects.