Ziplock bottom gusset pouches are stand up pouches with a bottom gusset and come with an added Ziplock that allows it to be resealed even after the packaging is opened. The bottom gusset provides extra storage and support. These pouches are a type of stand-up pouches that can also be kept in a vertical position on the shelves. The Ziplock implementation can vary from pouch to pouch. The single track zipper is common.