Zipper closure SPACE SAVING by COMPRESSION:Save Up to 60% Space by Compressing the Packing Cubes via the Exterior Compression Zippers. You just need to : 1) Fold Your Clothes and Flatten Them to Pile One by One Neatly 2)Pack the Neat Clothes in the Packing Cubes and Zip the Normal Zipper. 3)Put a Finger on the Back of the Zipper in the Space When Compressing the Packing Cubes in Case the Zipper Get Stuck in Fabric. PREMIUM UPGRADED NYLON FABRIC:Smooth&Soft Nylon Fabric Protects Your Clothes from Wrinkles and Stains.High Performance Feature Makes Sure this Packing Cubes can Bear High Density Wear and Tear during Traveling.Water-Repellent Feature Nicely Protect Your Clothes from Spill or Leaks.Easily Store Your Clothes and Protect Your Clothes from Stains and Wrinkles LIGHTWEIGHT&DURABLE:Super Light Nylon Fabric and Considerate Designed Construction Ensures Storing Your Clothes Neatly in Luggage without Adding Extra Weight.Premium Sturdy&Smooth Double Way Zipper with Extended Cord Ensure Fast&Easy Opening and Closing of the Packing Cubes. VERSATILE and MULTI-FUNCTIONAL :Different Sizes Packing Cubes for Different Packing Purposes.Separating Your Clothes,Such as Jackets,Sweaters,Underwears,Socks into Different Packing Cubes for Easy Access. ITEMS INCLUDED:This Set Of Packing Cubes Includes One Xl(17.5 Inx12.75x4in),One L Size(13.75" X 12.75" X 4"),One M Size(13.75x9.75x4), One S Size(11" X 6.75" X 4")