Engineered for the best fit & unique look possible. The Alderbooke&&';;s rope cording placement is ruggedly sophisticated. Flexible rope placement securely keeps the sandal in place throughout the day. The ankle and knotted strap bands can slide for personalized comfort. Easy to wear, forget you even have it on! a (Rope) 100% Polyestera (Insole) 40% PU and 60% Polyestera (Mid Sole) 100% EVAa (Outsole) 100% Recycled Rubber If you are a half size, consider ordering the next full size up.