KEEP IT FRESH – Preserve the freshness of your contents with a degassing valve to keep gases and moisture out of the bag. Impulse sealer sealable flaps with tear notch for lengthy storage FOOD SAFE MATERIAL – Natural White Kraft Paper + Aluminum foil fused protective inner lining + LLDPE DURABILITY – A heavy-duty bag that provides both an excellent moisture barrier and high resistance to puncture and tear with it 6 milliliters thickness NICE SHAPE: Flat Bottom Box Pouch Bag with Air Release Valve and Zipper. (One Way Degassing Valve, Resealable zipper, Flat Bottom for better Shape) VARIOUS SIZES: 4 Sizes: (Note: Must seal the top after putting Coffee using the Impulse Heat Sealer) VARIOUS SIZES: 4 Sizes: (Note: Must seal the top after putting Coffee using the Impulse Heat Sealer)