SEEFLEX Nylon II neoprenenFlexible vulcanized rubber solenTwo seam pattern minimizes chafingn3mm upper with 5mm inner solenRubber toe, instep and heel capnThis light-weight 3mm dive or snorkeling boot is made from SEEFLEX Nylon II neoprene with a flexible non-slip rubber sole. The two seam pattern minimizes chafing and the areas subject to increased wear are reinforced with rubber.