Smell odour proof bags plastic mylar aluminum grip seal lock Eliminate Smells and Seal in The Freshness Smell Buster Aluminum Foil Bags Uses - Food, Herbs, Coffee, Sweets, Nuts, Seeds, Pharmaceutical Packing, Tablets, Snacks, Pet Foods, Coins and many others. Seal in the freshness eliminate the smell. Sealing - Air tight Grip Seal Reusable / Resealable Colour - Aluminum Grey / No branding Water Resistant / Air Tight Thickness - Very Heavy 120 micron Material = Mylar plastic & Aluminum Foil Smell Proof - Reusable Bags 6x8cm (2.3"x3.1") - Smallest 11x16cm (4.3"x6.2") - Small 14x19cm (5.5"x7.4") - Medium 17x24cm (6.6"x9.4") - Large 23x35cm (9"x13.7") - X Large Other bag styles are available please check my other listings.