These sandals by ASOS Collection have been made with a leather-look upper and a rubber sole. The details include: a two-part design with a pin buckle ankle strap, peep toe styling and a contrast flatform sole with a serrated tread. Upper: 100% Polyurethane. Lining: 100% Polyurethane. Sole: 100% Rubber. Heel: 3.5cm/1.4" Platform: 2cm/0.8"