The Duosaf security zipper delivers top security, and the Optimov shock-absorbing wheels allow smooth rolling on bumpy surfaces. The recycled interior lining is treated with Microban technology to reduce the growth of bacteria.Elevated design and function, Curio Book Opening is a 2023 Red Dot Design award winner. The collection combines the practicality of a soft case with the toughness of a hard case. It features huge packing volume with expandability in all sizes.