MATERIAL - These resealable mylar bags are made of aluminium foil which protects your food from moisture and makes it stay fresh for longer than regular black smell proof bags. MULTIPURPOSE - Our smell proof baggies can be used to store frozen foods, cookies, candies, beans, spices,dried fruits, dried flowers and much more. PACKAGE SIZE - You will get 100 pieces of resealable bags for small business - 3 x4 inches in dimensions. These smell proof mylar bags can be used to protect your goods from effects of weather changes. HEAT SEALABLE - These smell proof ziplock bags can be sealed easily with a hot iron or heat-sealing machine. Moreover, our black ziplock bags are a good choice to save your food from exposure to air, light, odors, and moisture. PROTECTABILITY - These sealable bags for packaging are water proof, puncture resistant with easy tear notches and resealable zipper.