Product description Light-soled slipper material - Memory Foam. Thanks to the foam memory slippers, it takes the shape of your foot and helps you move comfortably all day. Product content Upper: Pu Slippers Insole: Memory foam. Memory Foam differs from well-known foams thanks to its adaptability as a flexible material. It can easily return to its former state compared to other foams. That's why it is called memory foam. Base: Phylon. Phlyon is a high quality sole material that is lightweight, flexible and has good cushioning performance.