NAUEL-KM. This men's slipper is made of fabric. The entire sole is made of non-slip rubber. The sole is flat and has a removable insole with a 2 cm thick wedge at the heel. This model fits the usual size; if you are between two numbers, choose a larger size. It is not advisable to wash the slippers in the washing machine. We recommend consulting the care guide to know how to keep them.