The Ruby Expert features Adaptive Edge base construction technology that allows the saddles outer edge to adapt to the shape of the body. With hollow titanium rails a carbon-reinforced shell & Body Geometry shape the Ruby Expert is made for superior performance on long rides. Womens Body Geometry cutout is scientifically tested & ergonomically designed. Stiff carbon-reinforced shell with flexible Adaptive Edge technology. Super-light padding with gel inserts for comfort & support on longer rides. Lightweight & durable hollow titanium rails. Tough lightweight water-resistant Micromatrix cover. Level 2 padding: Medium density foam with Gel for additional cushioning.SWAT compatible mounts molded into the saddle base allow for sleek & integrated storage solutions. Size 143mm / Weight 252g Size 155mm / Weight 253g Size 168mm / Weight 260g