Luggage set in gray color. They are made of ABS (Acrylonitrile-Butadiene-Styrene), a thermoplastic material that offers good impact and scratch resistance. These suitcases are slightly heavier compared to polypropylene suitcases. They are not recommended for frequent or long trips, where increased durability and resistance are required, as they are more likely to crack or scratch over time, especially with frequent use.