This is the XS Scuba Cortez II Fins Open Heel Scuba Diving Fin Features: Flexible center channel improves power and efficiency Co-molded thermoplastic material Includes silicone Stretch Straps with quick-release buckles Includes mesh tote bag Colors: all black or blue with black accents The XS Scuba Cortez 2 Fins are Professional scuba diving fins, with a flexible center channel that improves power and efficiency. The XS Scuba Cortez II Fins is built from Co-molded thermoplastic material and includes silicone XS Scuba Stretch Straps with Quick-release buckles.