Zipper closure SPACE SAV by COMPRESSION:Save Up to 60% Space by Compress the Pack 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 Pack Cubes and Zip the Normal Zipper. 3)Put a Fer on the Back of the Zipper in the Space When Compress the Pack 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 Pack Cubes can Bear High Density Wear and Tear dur Travel.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 Stor Your Clothes Neatly in Luggage without Add Extra Weight.Premium Sturdy&Smooth Double Way Zipper with Extended Cord Ensure Fast&Easy Open and Clos of the Pack Cubes. VERSATILE and MULTI-FUNCTIONAL :Different Sizes Pack Cubes for Different Pack Purposes.Separat Your Clothes,Such as s,Sweaters,Underwears, into Different Pack Cubes for Easy Access. ITEMS INCLUDED:This Set Of Pack 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")