The 6 Strict Testing Standards After going through repeating testings: wheel abrasion test, handle test, zipper test, anti-scratch test, drop impact test, tumble test, we are proud to present Waves Luggage in three sizes. With wave-like design, combining anti-scratch texture shell, double coil zipper, TSA lock system, Hinomoto swiveling wheels, hang-able mobile storage partition and more; equipped with all you need.