About This SMELL PROOF BAGS: the material of the bags is aluminum foil and plastic, it can block the water, moisture, odor, and dust from the outside; keep your food fresher for a longer time RESEALABLE BAGS: the zipper design is easy to open and seal, you can reseal it multiple times HEAT SEALABLE BAGS: heat sealing strip is on the top of the bag, and the opening notches on the sides, you can heat-seal it to extend the storage time MULTIPURPOSE: suitable for storing dried food, tea leaves, coffee beans, cookies, nuts, candy, sugar, salt, rice, spices, and so on Quantity: 50 pcs / Outer size dimension: 8x12 inches (20.5x30.5 cm), and the bottom gusset is 3.5 inches (8.9 cm) / Color: Both sides matte black / Thickness: 5.11 mils (one side) This product is not microwavable. Overview Brand : Chamigon Product Dimensions : 8"W x 12"H Recommended Uses For Product : Cooking Closure Type : Zipper Number of Items : 50 Special Feature : Resealable, Stand Up Shape : Rectangular Color : (50 pcs) Matte Black Item Weight : 0.98 Kilograms Model Name : Chamigon 8x12 Black Mylar Stand Up Bags