2.5 mil Kapak Evidence Barrier Pouches are ideal for packaging and storing evidence. Barrier Pouches are useful in a wide variety of applications for evidence collection. These 2.5 mil heat sealable polyester pouches are constructed of a combination of films with ideal barrier properties. This barrier eliminates cross-contamination while protecting individuals from exposure to dangerous substances. Pouches must be sealed with a Barrier Pouch Heat Sealer. When properly sealed, these pouches provide an airtight, and puncture resistant container for collecting, transporting, and storing evidence. Pouches feature a 2.5 mil thickness. Provided in bulk cases of 2,000 barrier pouches. For use with Barrier Pouch Heat Sealers only.