From Birkenstock, the Women's Utti Suede Slip On Loafers feature: Suede upper Slip on design BIRKENSTOCK® Deep Blue footbed provides superior underfoot support with a moisture-wicking lining and PU base that optimizes your natural walking motion Microfiber footbed lining Deep heel cup supports the foot and holds the heel firmly in its natural position Natural cork and rubber blend outsole for added traction Imported.   Sizing Notes: Birkenstock footwear is made in European whole sizes. The style selected is a Birkenstock narrow footbed that will fit most medium feet.