Bike Yoke Sagma 3D Carbon Saddle. Features: 3D printed foam structure for ideal comfort Carbon rails for decreased weight and even more comfort Follow Function is an elastomer shock absorber which allows the saddle to follow your movements when pedaling while seated. This can also reduce pressure on the inner thighs in DH riding as the saddle tilts for more contact surface, reducing the risk of bruising Extra elastomers in the hard and soft variety are also included with the medium version installed Carbon reinforced shell Carbon rails are exchangeable as they bolt to the main saddle 3rd party web sales (eBay, Amazon, etc.) are strictly prohibited by the manufacturer Specs: Model:Sagma 3D Carbon Rails:Carbon Top:3D Matrix TPU Color:Black Lx W Mm:242x130 Weight:240g