Our signature Heavy Duty Barrier Pouches are ideal for packaging and storing chemicals, controlled substances, paraphernalia, and volatile materials. Barrier Pouches are useful in a wide variety of applications for evidence collection and feature a 3/8" 3 sided seal. These 5 mil heat sealable nylon pouches are constructed of a combination of films with ideal barrier properties. This barrier eliminates cross-contamination while protecting individuals from exposure to dangerous gasses "leaking" through, such as PCP and methamphetamine, as normal polyethylene baggies. These pouches are approved and used by many federal, state, and local narcotics agencies. Pouches may be sealed with any quality Heat Sealer. When properly sealed, the pouches provide a heavy-duty, airtight, and puncture resistant evidence container for collecting, transporting, and storing evidence. Provided in bulk cases of 1,000 pouches or in packages of barrier pouches.