The SLR Boost TM saddle marries modern technology and saddle ergonomics to the popular SLR design. It shares the same design and molding as other SLR Boost saddles, but at a fraction of the price, thanks to the utilization of manganese and chromoly TM rails and a Soft-Tek polyurethane cover. The traditional central fill with an indented central channel to allows for pressure-relieving comfort.