HOW TO MAKE THE COMPRESSION HAPPEN? - There Is a Extra Zipper Outside Of Our Compression Packing Cubes Which Can Be Zipped Up To Flatten The Cubes And Save The Space As Far As Possible. It Just Works Like a Vacuum Sealer. You Just Need To :1) Fold Your Clothes And Flatten Them 2)Pack Clothes In The 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.
