COATS&CLARK-Zipper. Coats Parka Dual-Separating Zipper is a separating, polyester, molded, sport-weight zipper with two sliders so that it can be opened from both the top and bottom. It is especially suitable for longer length jackets, coats, ski suits and for all types of action sportswear. This package contains one 28in zipper. Available in a variety of colors: each sold separately. Made in USA.