Ergon ST Core Prime Women's SaddleErgon ST Core Prime Women's Saddle The ergonomic saddle revolution for touring bikes. The floating TwinShell with ergonomic core supports the natural pelvic movements while pedaling, actively relieves the sit bones, and reliably dampens vibrations caused by the riding surface. The core consists of the latest E TPU materials, bringing state of the art technology in responsiveness and damping. The saddle shape has been anatomically perfected