Fizik Arione 00 Braided Rail Saddle The Arione is 1 of fi'zi:k's 3 Spine Concept Mens Road Saddle shapes. Of these 3, the Arione shape is flat, narrow and long Carbon Braided Rails- Fi'zi:k's rails use an outer sleeve of braided carbon fibers forming a tube, with the void inside being filled by unidirectional carbon fibers. Wing Flex Technology- Engineered flexibility along the edges where the inner thighs contact the saddle. Twin Flex Design- A layer of multi-directional carbon fiber provides strength, while a bi-directional layer allows flex Arione 00 is for The Snake: Flexible Spine