The sdg bel air rl cro mo saddle provides ultimate comfort support and control this saddle utilises a resilient polypropylene base which gives you extra flex on the edges and incorporates a base bridge for stiffness and ideal power transfer mid density pu foam has been strategically placed with a rear rise to help rotate your pelvis forward and provides additional support when you use the saddles optimal rideable area this saddle has a 34 cut design for excellent perennial relief