Birkenstock Arizona Birkibuc Sandal 100% Birkibuc: a synthetic alternative to nubuck Rubber sole Heel measures approximately 3/4" Platform measures approximately 1/2" Original suede-lined cork/latex footbed Classic Birkenstock 2 strap sandal Shock-absorbing sole Made of acrylic and polyamide felt fibers, Birkibuc offers a textured finish that looks and feels like velvety nubuck Please see Sizing Chart for US size conversions