Birko-Flor upper is made of acrylic and polyamide felt fibers, this material is a soft fabric with a smooth leather-like finish. Features two straps with adjustable buckle closures. Raised toe bar is designed to encourage the natural gripping motion of your feet. Offers a suede-lined, anatomically correct cork and foam padded footbed designed to mold to your feet, creating a custom footbed that supports and cradles every step. The soft footbed features a foam layer inserted between the cork layer and suede liner of the original Birkenstock footbed.