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 Nylon: The packing cubes are made of durable nylon fabric, professionally tested for abrasion resistance, with strong tear resistance, effectively resisting daily scratches and tears to ensure long-lasting durability Ultralight: Crafted from lightweight nylon material, this storage bag efficiently organizes your clothes without adding extra weight, so you can optimize storage without increasing luggage weight Easy to Sort and Organize: The front of the bag has a pocket for inserting custom labels. Making it easy for you to sort and organize and find items, and the packing list helps you to see if you're missing any items Items Included:The 6 set includes extra large, one large, one medium, one small, one slim bag and one shoe bag BAGAIL 6 Set Lightweight Compression Packing Cubes with Packing List, Anti-Tearing Expandable Organizer Bags for Travel