The fizik tundra m3 saddle has been designed for cross country riding in mind and has been constructed using a new fiberglass thermoplastic composite wingflextm which provides a quality performance with an optimized stiffness to weight ratio this fizik mtb saddle uses a microtex cover which offers strength and durability while the windflex technology offers riders comfort health and performance benefits by allowing free thigh movements ensuring that your pedalling isn39t affected by your s