A dynamic riding surface that moves with your every twist & turn, the Fizi:k Kurve Saddle offers superior riding comfort & efficient power transfer. Add Spine Concept specific shapes & the Kurve is truly the worlds best saddle. To create the tuned riding feel of the Kurve Saddle, Fizi:k have carried out extensive research combined with rigorous lab & field tests to ensure their fabric & shape choices are just right. The whole base of the Kurve Saddle responds to your body in motion, responding to every minute movement. This base is made from a stuff thermoplastic composite with a special lay up that can react in any way to boost the interaction of the Kurve Saddle & you. This version of the Kurve Saddle is made for Bulls & features carbon braided rails to shave 40g off the aluminium Kurve. Fizi:k Spine Concept: Bull Fizi:k offer three unique shell designs, one for each level of spine flexibility. This Fizik Kurve Saddle is made for Bulls, the least flexible of the three levels with a relatively low degree of spinal flexibility. You will rotate your pelvis fully to achieve the performance position & will benefit from the increased curvature of Bull Saddles. Description by Mark, Rutland Cycling Web Team.