How to Compress: The cube is compressed by the middle zipper; Using steps: 1)Fold and flatten clothes 2)Pack clothes in the cube and zip the front zipper 3) Put a finger on the back of the middle zipper when compressing to avoid zipper get stuck in fabric Durable and High Strength: Although the fabric we selected is lightweight, but also durable enough; Special structure of the Cordura fabric makes it has superior wear resistance, tear resistance, so they can with stand long time use Convenient&Multi-Functional: Classifying and organizing your belongings for your travel will become easy with these lightweight packing organizers; You can choose different size and color set for different use purposes Space Saving: Save up to 50% space by compressing the packing cubes via the exterior compression zippers; And all the zippers we use are SBS zippers, it makes sure the packing organizers could be opened and closed easily Size Information:1XL-17.5x12.75x4”, 1L-15x12.75x3.5”, 2M-14x10x3.5”, 1S-11x7x3.5”, 1 Shoe bag-16.9x10.2x4” BAGAIL 6 Set Ultralight Compression Packing Cubes Packing Organizer for Travel Accessories Luggage Suitcase Backpack