Bike Yoke Sagma 3D Saddle. Features: 3D printed foam structure for ideal 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 Forged aluminum rails are exchangeable as they bolt to the main saddle 130mm: 208g; 142mm: 219g 3rd party web sales (eBay, Amazon, etc.) are strictly prohibited by the manufacturer Specs: Model:Sagma 3D Rails:Forged Aluminum Top:3D MAtrix TPU Color:Black Lx W Mm:242x130 Weight:260g