SQUASEM combines an organic form and design with tile of square-shped pattern. Made of versatile and strong PP material gives SQUASEM a strong and durable structure. Expander on all sizes allows flexibility during packing. DUOSAF ™security zipper also provides extra security for your belongings. OPTIMOV ™shock absorbing wheels are sure to let every traveler with excellent rolling experience, upon noise reduction, comfortable rolling, and bumpy surface tested.