The reason why there are two brands on the zipper head of this type of large down jacket vest. The first brand is for zippers. The brand is generally y kk, and y kk is the brand that makes zippers. brand, because ykk is a very good zipper brand at the moment, so many high-end clothing use ykk zippers, and yk requires its own unique zipper brand to be attached to the zipper when using it. The second brand is the brand of the brand.