A very comfortable foot pocket, light to moderate weight fin. The blade is symmetric, and curved, and the thrust is very good. They float, and have a good design for aiding in holding an edge on the wave when you're prone riding. Ergonomic foot cavity for ultimate comfort on either foot Exclusive central vortex design ensures complete sand drainage when inverted in kicking mode Has a patented V Rail for maximum speed and traction Non-slip tech tred Floating natural rubber Australian designed. <br /> <br />Swimfin Weight: 3.3 lb per pair. <br /> <br /> <b>Size Chart</b> <br /> <ul> <li>X-Small (M: 3-5 / W: 5-6.5)</li> <li>Small (M: 6-7 / W: 7-8.5)</li> <li>Medium (M: 8-9 / W: 9-11)</li> <li>Medium-Large (M: 9-10 / W: 10-11.5)</li> <li>Large (M: 10-11 / W: 11-12.5)</li> <li>X-Large (M: 12-13 / W: 13-14.5)</li> </ul>