Tamper-evident construction helps to guard the integrity of important contents Bags secure bank deposits and are built to withstand the impact of the night depository drop. Durable co-extruded film is water and tear-resistant and completely recyclable where facilities exist. VOID message appears in the sealing mechanism when exposed to cold temperatures or chemicals. Self-sealing adhesive closure is easy to use and has security features that exceed bank requirements for levels of tampering evidence at temperatures ranging from -60F to 160F. Information can be written directly on bag in yellow shaded areas.