Also known as moisture-proof vacuum bag, the material is generally PET / AL / CPE or PET / NY / AL / CPE. Which PET-- printing effect is good, NY-- low oxygen permeability, AL-- strong barrier, impervious light, CPE-- inner packaging, this product has a good anti-static, oxygen barrier, shielding, moisture, shading function and excellent heat-sealing properties, mainly used in food vacuum bag, vacuum bag cereals.