Vacuum Bags, PYRUS Space Saver Bags Business Trip Travel Hand Roll-Up Compression Bags(4pcs) No vacuum or pump is needed for these vacuum bags - just pack, zip and roll. The air will exit from valves at the bottom of the bag. Protect your clothes against odor, dirt, bugs, moths, spilled water/liquids etc. The compression bags are airtight and watertight. Organize your clothes, for example by family member, outfit, activity, out of season clothing etc. Keep your dirty clothes in separate compression bag. Great for storage! Save up to 3 times the space in your closet or storage area. Increase storage space in your suitcase, luggage or closet. Great for travel! Who doesn't need more room in a suitcase? Seal off dry clothes, wet clothes, any type of clothing. Even pack your favorite pillow - clean and compressed. Perfect roller bags for travel.