From Birkenstock, the Women's Zermatt Shearling Lined Family Matching Slippers feature: Wool felt upper Slip on design Shearling lining for comfort and warmth (New Zealand) Suede footbed liner keeps your foot dry & comfortable Contoured cork footbed supports the arches of the foot Deep heel cup for all-day comfort Dipped rubber outsole for traction Flat heel Imported. Styling Notes: Birkenstock footwear is made in European whole sizes. The style selected is a Birkenstock narrow footbed that will fit most medium feet.