Genuine felt made of 100% pure new wool has been used as the upper here. Thanks to the dispense with synthetics fibers, the material is warm, breathable & highly resilient at the same time. This slip-on features a felt-covered replacement footbed made of soft foam. It gently cushions your steps and can be removed by hand within a second. The outer sole is made of lightweight, flexible rubber that allows for natural, unhindered movements of the feet. It has a slip-inhibitory profile that provides the necessary stability on more slippery floorings.