RS SC 100 MVPower and Precision. The new RS 100 Short Cuff Wide designed for junior racers and women, is the result of our deep understanding foot mechanics, fit, and ski boot behavior. Our new, race developed Dual Core construction supplies incredible energy and flex control for total control through the turn. The new anatomic shell design integrates perfectly with our new thermo formable Dual 3D liner, delivering unparalleled comfort, precision, and power