The London Fog Regent Collection is made in a durable polycarbonate alloy hard side construction with a leather inlay trim. Each spinner has 8 recessed spinner wheels that make traveling smooth. Interior has zippered lid compartment, mesh pocket and mesh packing cradle to keep your belongings organized. There are TPR (thermoplastic rubber) cushion grips on top and side carry handles and a bottom grip handle on all sizes. Spinners expand 2 for additional packing capacity. Industrial zippers are self repairing.