Brooks england cambium c13 carved saddlethe brooks england cambium c13 carved saddle combines lasting comfort with a very low weight due to its flexing upper and monocoque carbon fibre structure and rails it features a central cut out which helps to relieve pressure on sensitive areas and despite its use of modern materials the cambium c13 still manages to give a nod to brooks vintage look with its aluminium rivets at the rear features usage road upper vulcanised natural rubber base mon