LockandLock Vacuum Space Saver Storage Bags Valve Type 2p (Large(27.56 x 35.43 inches)) Reduce the original volume by up to 75% : Use vacuum for compression. Protection from moisture, insects, dirt and odors. Double-Lock Valve : Use any vacuum with a hose Air-tight zipper : For the perfect seal that will not pop open. Tripled vinyl layer(NYLON/TIE/LLDPE) : Excellence in durability.