Surprise sale. Memory foam and EVA deliver plush, underfoot comfort to the Acorn Forest Mule scuff, which is finished with an indoor/outdoor non-slip synthetic sole to carry you safely to the end of the driveway and back again. Trimmed in suede and accented with a graphic embroidery design, this women's slipper clog wraps your foot in all kinds of ''cozy,'' from its boiled wool upper to its plush fleece lining and sockliner.. Material: Wool, Fleece, Synthetic.You may need a doctor's note to stay home more often with the Acorn Forest Mule slipper.Multi-functional