Storage is a breeze when you use the LOCK&LOCK Smart Bag, Valve Type, Set of 2 pieces. Its unique design creates an airtight and watertight seal that protects against bugs, moths, dirt, mildew and odors. Double zipper maintains the bag ultimately airtight . Multi-layered and thickened films for more durability and strength. Save up to 4 times more space. Protection from moisture, insects, dirt, odors.