Materials: BOPP/VMPET/CPP Quantity:50/100 bags in bundle Please Note: the size is outer size width x length Perfect for Food,Incense,Tea,Herbs,Candy,Snack and so on packing. These bags are adhesive bags,but also can be sealed with an impulse sealer to prolong the shelf life of any product. The bags protect the contents from UV damage, water vapor, debris, and more! For extended storage time, you can heat seal above the zip lock! The tear notches enable access even after heat sealing. The mylar material provides a light-weight but durable and flexible solution for packaging.