The manner in which evidence is stored and protected can often mean the difference between conviction and acquittal. With this in mind, Sirchie introduces the integrity evidence bag (4x7-1/2"). These All-in-One bags are waterproof, tear- and puncture-resistant, printable and include a tamperproof seal. No other evidence bag offers greater integrity, security and convenience. It is made up of heavy-duty, 3.2-mil-thick, multilayer, coextruded polyolefin film.