Recyclable Paper Coffee Bags With Valve And Zipper use MADE OF THE SAFEST MATERIALS - This sealable bags coffee pouch are made of Natural kraft paper + Aluminum foil fused protective inner lining + LLDPE, odorless, reusable, waterproof and pollution-free. Laminated material offers an excellent aluminum barrier to protect against moisture and air. Solid Kraft panels provide an open space for customized branding and product labeling.