5.5mil Kraft Paper Inner Mylar Foil Ziolock Bag with Tear Notches Heat Sealable Resealable Pouch Smell Proof Spice Coffee Jerky Long Term Food Storage Bag (100, 3.1x4.3 inch (8x11cm)) Inside is Aluminum Mylar Foil, Outside is Kraft Paper DURABLE MATERIAL-- Thickness: 0.14mm (5.5 mil)(one side) Re-sealable, can be made tamper proof with a heat sealer For extended storage time, you can heat seal above the zip lock! The tear notches enable access even after heat sealing MULTIPURPOSE USE-- Perfect for smaple cosmetic mackup, food coffee, beans, candy, sugar, rice, baking, cookie, tea, nuts, dried fruit, dried flowers, powder, snack and more long term storage