The 'Airjacket' Poly Bubble Mailer is an excellent way to ship small to medium sized items and documents. Easy to load contents and seal package when the packing process needs to be fast and efficient It has a Self-Seal Adhesive Strip, a multi-layer (co-extruded) polyethylene exterior film laminated to an interior bubble material, and a PACzip tear strip that saves time in product retrieval. The PACzip does not compromise the security of the contents in transit or the integrity of the mailer like a traditional perforation. Side pouch heat seal and bottom fold construction offers superior bursting strength. Your contents will remain secure from the point of origin to its destination. 7/64" bubble height.