Birkenstock Women's Arizona Soft Footbed Black Birko-Flor 40 N Imported Narrow width footbed birkenstock arizona in black with birko-flor upper (not real leather). Comfortable soft footbed and black eva sole. The soft footbed features a foam layer inserted between the cork layer and suede liner of the original birkenstock footbed. Microscopic air bubbles cushion your feet while providing moderate arch support and is made of 100% renewable and sustainable cork. This is a "narrow fit" sandal with "narrow foot icon" (filled in foot) which accommodates narrow feet.