The TYR Crossblade 2.0 Fins are for the swimmer looking to increase technique and performance. They feature 100% natural rubber construction with new thickened foot pockets for increased durbility and comfort. They are engineered with an intermediate blade to promote increased tempo and speed through the legs when moving through the water helping swimmers maintain the resistance necessary to build leg power and improve technique. These fins also help to prevent athletes from feeling discomfort as they move. The TYR Crossblade 2.0 Fins are a great training tool for training your favorite swimmer.