The new Power Arc Expert expands on the success of our original Power saddle. It features the same channel and length as the original but with wings that arc down a little more for less hamstring/thigh interferrence. If you&';re already a Power loyalist, this iteration features a curved Body Geometry shape that better contours to your body. What does this mean for your ride? It means that you&';ll feel as if you&';re "in the saddle" and not on it. And ultimately, this equates to greater comfort and superior performance in all seated positions, no matter what kind of rider you are. Patented Body Geometry design is lab-tested for both men and women to assure blood flow to sensitive arteries. Lightweight and supportive PU padding for comfort and support on longer rides. Lightweight, durable, and hollow titanium rails. Level 2 padding: Medium density foam for bike feel with additional cushioning. SWAT(TM)-compatible mounts molded into the saddle base allow for sleek and integrated storage solutions. Size 143mm / Weight: 243g Size 155mm / Weight: 254g Size 168mm / Weight: 258g