Cressi 2.5 mm Anti-Slip Boots
These are single-lined, thin, high stretch neoprene boots.    The inner is lined in Metallite so they are easy to put on.    The sole has an effective non-slip lining.    They can be used with both closed foot fins for greater warmth and to protect the skin from scratches and chafing, as well as with firm-soled boots, using open-heel fins.    In this case, warmth is considerably increased and it is also easier to put on your wetsuit.