Separating zipper
Separating zippers are made to open at both top and bottom, permitting the zipper opening to separate completely. Although used mainly on jackets, they can really be applied to any garment with a completely opened front. It is possible also to get reversible separating zippers with pull tabs on both side. Also, dual reversible and two-way zippers that zip from the top and from the bottom are available for jumpsuits and similar garments. A centered application is the method generally used.