Serious water sports athletes depend on gear to keep them safe, warm and help them perform. The Maiori does this by providing warmth and traction to perform at the highest level. Materials: UPPER - 2mm Neoprene Jointed fourth and fifth toe help protect the toes during intense activities INSOLE - 2.5mm EVA + Anti-Microbial Drilex Sockliner COMPOUND - Wave Grip MAX SOLE THICKNESS - 3.2mm Machine wash Cold/Air dry. Weight: Men's size 43 - 6.53oz. each, 13.06oz./pair