Finis Zoomers Fit fins use a comfortable and lightweight Surflex material that floats the legs for a proper body position. The fitness-oriented fins use patented Zoomers technology to generate easy propulsion in the water so that you can increase leg strength while making swimming easier. The closed-heel design creates a soft and secure fit, while the short blade construction promotes a shorter and faster kick specific to swimming. By being buoyant, the Zoomers Fit encourages an elevated body position to keep the legs active during your swim. The Flex Box on the underside of the fins will catch water during the up-kick, targeting and strengthening the hamstrings and glutes. Available in multiple sizes for a custom fit.