If you ride your bike two or more times a week, for medium to long distances, the Sportourer saddles that are right for you will feature medium softness pads and have slightly smaller dimensions. Biox Skin is the first material obtained from Castor oil. The Castor bean requires little water to grow and is a fully renewable resource. Using less energy in production, reducing Co2 emissions and is also fully recyclable. Elastomer suspension or shock absorber system. Inserts in silicone gel with differentiated thickness around the middle anatomic cutout and seating area. Material: Synthetic Leather. Weight: 550g. Size: W 165 x L 270mm. Rail: FEC Alloy. 100% Waterproof. Elasticity & Softness. Elastomer suspension shock absorber system.