The Fizik Antares R3 saddle features improved weight distribution with the Kium rail to ensure greater comfort and better performance. Composed of nylon-injected fiberglass with Microtex coating - Wing FlexStructure flexes downward, bringing the inner thighs into contact with the saddle for greater efficiency in the pedaling motion. What's more, the saddle can extend over the frame to allow the rider to find the most comfortable position, thus eliminating the usual problems of a saddle that's too long, too short, too wide or too narrow.- Clip SystemSystem integrated into the saddle base that allows quick, clean, easy and secure attachment requiring no tools. It's as easy to put on as it is to take off - Nylon-injected fiberglass cover - Size: 274 x 152 mm- Cover: black Microtex - Weight: 205 g - Rail: Kium - Color: black