Ziploc, 2 Count, Travel Roll Space Bag, Reusable, Vacuum Seal Design Creates Up To Twice As Much Storage Space, Roll Air Out Through The 1 Way Valve To Compress Bulky Items, Airtight & Watertight Seal Protects Against Dirt, Moisture, Bugs, & Odors, Allows You To Roll Out The Air With The Patented 1 Way M Value, Allowing You To Pack 2 Times More Patented Closure Ensures Air & Water Tight Seal, Contains 2 Each Carry On Sized Space Bags.