Film Laminate Metal Layered 0.0035” (3.5 mil) Thick Bag. Designed for electrostatic discharge (ESD) shielding protection. Meets ANSI/ESD S20.20, ANSI/ESD S541, EIA 541, JESD625-A, and EIA 583. 0.02 Grams Moisture Vapor Transfer Rate (MVTR). Designed for dry packing of moisture sensitive devices and to protect contents from damage due to ESD events or EMI.