RESEALABLE SEALING STRIP - The mylar bags feature a sealing strip to keep water and moisture dust or any odors out when sealed, and the sealing strip is very tight, you will never question whether the mylar bags are open or closed. LONG TIME FOOD STORAGE - The black smell proof bags is mylar and foil material, means your food stay fresher for longer than a regular mylar bag. Smell proof pouch is suitable for packing, storing, , sampling, and sorting. PRACTICAL - This mylar bags for food storage can store coffee, beans, candy, sugar, rice, baking, cookies, tea, nuts, dried fruit, dried flowers, powder, snack, medicine, herbs, spices, and much more food or decorations. HEAT-SEALABLE - The resealable mylar bags can heat sealable, double sided matte black heat seal bags. The mylar bags can work with various food sealer machines for extra protection. SIZE: Outer size is 7.5 x 10 cm/ 3 x 4 inches, inner size is approx. 6.5 x 7 cm/2.56 x 2.76 inches, you will get 100 pcs resealable smell proof bags, foil bag will protect your goodies against dry climates whether.