2 layers. 60 μm inner layer made from food grade Polyethylene.15 μm outer layer made from Polyamide (nylon) – increases strength and guarantees airtightness. Total thickness: 75 μm. The materials used act as a UV filter. Embossing for easier air extraction and obtaining vacuum. Can be used in temperatures from -20˚ to +100˚C. Suitable for chamber vacuum and strip packing machines.