The baabushka(r) Slipper with Rubber Sole is meant to be worn indoors or outdoors providing comfy cozy warmth for your feet. Made by hand using traditional wool felting techniques that use only, wool, organic soap and water. Upper, Lining and Insole made of 100% New Zealand Wool that has been felted. Sock-like all wool upper is lightweight, breathable and flexible. Non-skid outsole with tread for traction.