The PAC ‘N STACK is QUICK AND EASY TO USE: and comes with the handheld, travel-size pump and 4 bags. In just three easy steps, you can have instant storage. Simply fill the bag with your valuables, use the clip to seal the bag, and connect the pump for an airtight, vacuum seal. Thanks to PAC ‘N STACK you can store away winter gear or pack for a trip with ease. COMPACT AND PORTABLE: Not only does the PAC ‘N STACK make for more compact storage, but the connected pump is cordless and small enough to stow away in your newly organized storage space. Stop scrambling with messy cords or bulky vacuums and bring the pump with you while traveling or store until needed again. REUSABLE, AIRTIGHT, AND WATERPROOF: PAC ‘N STACK storage bags are reusable, airtight, and waterproof, making them perfect for clothes, towels, blankets, and so much more. Your soft valuables will be safe from leaks and spills that cause dampness and mildew. Get fresh and clean storage with PAC ‘N STACK’s instant storage capabilities. REDUCES VOLUME UP TO 50%: PAC ‘N STACK now makes for endless storage opportunities with added organization. Our vacuum sealed storage bags reduce the volume of your belongings in half. Double your suitcase or closet space and never worry about running out of storage again. GREAT FOR TRAVEL: Whether you carried on or just need more space for your camping gear, PAC ‘N STACK has you covered with its airtight seal and waterproof exterior. PAC ‘N STACK makes packing easy and fun. A cordless pump makes this the best and easiest way to pack and travel. AAA batteries for pump are not included. INCLUDES: 2 Large Bags (17.5x27.5 Inches), 2 Medium Bags (19.5x 23.5 Inches, 1 Vacuum.