Ergon SMC Core Women's Saddle - MD/LG, Black/GrayErgon SMC Core Saddle The patented Core design allows the saddle to effortlessly follow pelvic movements enormously reducing pressure on the sit bones and genital area. The floating TwinShell concept with the ergonomic core supports the natural pelvic movements while pedaling, actively relieves the sit bones, and reliably dampens bumps caused by the riding surface. Product Details: 308 lb recommended max rider weight limit S M fit sit bone width of 9