Water- and eco-conscious Terracare® ¿ leather Terracare® leather (fixed and non-removeable) None: the insole is flat. (Most inserts and orthotics are well-accommodated.) Natural Italian crepe rubber Medium-to-wide fit with a wide toe box that allows toes to splay naturally. Offered in European sizes, which are gender-neutral. All materials originate in Europe; final production occurs in Poland.