This material is impact-resistant with a matte finish, so it looks great and is super strong. The custom-made DualTRAK wheels are low-profile wheels that ensure a smooth ride around the airport and streets; these are some of the best on the market. Secure your belongings with the built-in TSA lock. The suitcase's interior is well organized, with a butterfly interior, which means double dividers with pockets keeping everything secure. Reasons To Love The Epic Spin Medium Luggage Range Made from EPIC DuraLITE+ Duralite+ material sealed with a matte, durable top layer. Easy-rolling and durable DualTRAK wheels Butterfly interior, double dividers with pockets.