Flexible, lightweight and with a memory foam insole, along with a Nubuck leather upper and slip on style, the Arthur is an ideal choice for casual summer days. Upper Material: Nubuck. Lining Material: Textile. Sole Material: Rubber. Closure/Fastening: Slip-On. Features: Comfort,Memory Foam,Breathable. Toe Shape: Round. Shoe Width: Regular. Heel Height: Low (2.5-4.9cm). Shoe Style: Casual.