Abstract: A bed bug protective encasement for encasing an item includes: a fabric cover surrounding the item, an opening formed in the fabric cover to receive the item in the fabric cover; and a slide fastening mechanism disposed in the opening to open and close the opening. End stops of zipper tracks of the slide fastening mechanism extend beyond a bottom stop such that when a zipper head of slide fastening mechanism is at an end location in which the encasement is in a closed state, the zipper head has passed over and above the bottom stop from which the zipper head originated in a start location to define an overlapping region of the slide fastening mechanism. In the closed state, the overlapped slide fastening mechanism and attached upper and lower barrier wings together form a bed bug impervious obstruction to the escape of bed bugs from the item.

Abstract: A bed bug protective encasement for encasing an item includes: a fabric cover surrounding the item, an opening formed in the fabric cover to receive the item in the fabric cover; and a slide fastening mechanism disposed in the opening to open and close the opening. End stops of zipper tracks of the slide fastening mechanism extend beyond a bottom stop such that when a zipper head of slide fastening mechanism is at an end location in which the encasement is in a closed state, the zipper head has passed over and above the bottom stop from which the zipper head originated in a start location to define an overlapping region of the slide fastening mechanism. In the closed state, the overlapped slide fastening mechanism and attached upper and lower barrier wings together form a bed bug impervious obstruction to the escape of bed bugs from the item.