A "zipper enclosure" refers to a closure or fastening mechanism on a garment or bag that uses a set of interlocking metal or plastic teeth that can be opened or closed by pulling a tab attached to a sliding mechanism. Full definition
These feature an open toe, fringe details, adjustable ankle strap, back zipper enclosure for easy on and off, and a lightly padded sole for your comfort and support. (qupid.com)
Pillow covers are 22» each with zipper enclosure. (chairish.com)
The pouches come with a top spout and side resealable zippered enclosure, making them easy to refill and use again and again. (gofreshbaby.com)