An encasement for a bedding item includes a cover comprising a top portion, a bottom portion, and a side wall attaching the top portion to the bottom portion, an opening in the side wall sized to permit a bedding item to be removably inserted into an interior of the encasement, a zipper disposed in the opening of the side wall configured to reversibly seal the encasement, the zipper comprising an open end, a closed end, a zipper pull, and opposing complementary zipper tracks, and a zipper end stop disposed at the closed end of the zipper, the zipper end stop comprising an interior support panel attached to the top portion and the bottom portion of the cover beneath the zipper, a first securement means affixed to the interior support panel adjacent the zipper tracks, and a plurality securement members associated with the opposing complementary zipper tracks. Closing the zipper forms a beg bug impervious seal.