Z2 fins utilize a patented angle and quick response technology to promote a shorter, faster kick. The smaller blades make legs work harder without overloading the muscles, therefore helping you sustain better form over a longer period of time. The higher propulsion generated by the use of Z2 supports a higher body position and better body roll for a greater level of conditioning across freestyle, backstroke or butterfly. Z2s are easy to use because they create immediate propulsion and generate force in both directions of the kick. Their size and shape offer greater ease of movement, comfort and safety, and allow swimmers of any ability to transition the full power of their legs into the water. The Z2 model results from years of ongoing field research, and now incorporates a series of new design characteristics.