The 00 product designation is a uniquely special badge, reserved for only the very best fi'zi:k products.  Every 00 saddle is conceived and designed with a no-compromise approach to create the ultimate saddle.The Antares is 1 of fi'zi:k's 3 Spine Concept™ Mens Road Saddle shapes.  Of these 3, the Antares shape is wide and slightly curved in profile.The Antares 00 (00 meaning “the top” in Italian) is the top-of-the-line saddle available in this shape.  The high-modulus carbon shell with Wing Flex™ and Mobius™ carbon braided rail (NEW for 2016) make this the lightest and most stiff Antares model available.  Despite the saddle's very low weight, special 00 foam compound ensures that comfort is not compromised.Antares 00 is for The Chameleon: Medium Spine.If you have an intermediate degree of spinal flexibility (approximately 90 degrees between your straight legs and your back when bending over as far as you can, keeping your legs straight a shoulders' width apart), you are a chameleon.  Your degree of spinal flexibility helps you so far, before you need to rotate your pelvis slightly to achieve fully the performance position.You will benefit from the increased width and slight curvature of the Antares shape.Shell: High Modulus 00 Carbon, Wing Flex™ for freedom of thigh movement,Rail: Mobius™ Carbon Braided 7x9mm,Integrated Clip System: No,Length: 275mm,Width: 142mm,Weight: 140g.