Zipper locking bags are suited for many different packaging applications. Our zipper locking bags offer impressive clarity and durability for just about any need that is out there. Zip plastic bags are constructed of 100% virgin low-density polyethylene (LDPE) or polypropylene (PP) where noted. All of our plastic zip bags meet FDA/USDA, GMP, AIB, TSA requirements and Kosher approval for food contact.