This full-foot fin from Aqualung provides you with the opportunity to make the most out of each kick stroke. It's incredibly flexible material and innovative mid-foot flex point reduce joint strain and leg fatigue while at depth. When you say hello to the Express fin, you can say goodbye to sore legs, excessive fatigue, and inefficient kicking. Because the full-foot pocket consists of various thicknesses of materials, each kick is a more efficient use of your energy. No longer will you feel like you are kicking with all of your might without making forward progress. In addition to an innovative foot pocket design, the Express fins have blades that are constructed out of a durable and flexible techno-polymer material that cuts through the water to improve your use of energy and decrease fatigue.