Bianca Sandal (Black)Alexander Wang Bianca Sandal (Black) Alexander Wang .. 2005 105 . TPU (Upper): 100% (Lining): 100% (Embellishment): 50% 50% (Outsole): 100% : Black toe ring sandal set on a 105mm heel. Designed with a leather toe loop topped by a crystal ring ornament, TPU upper strap, nappa leather footbed, and a genuine cow leather outsole. Upper : 100% Thermoplastic Polyurethane Lining : 100% Sheep Leather Embellishment : 50% Brass , 50% Glass Outsole: 100% Cow