Brooks england cambium c19 saddlethe brooks england cambium c19 is made from a vulcanised rubber top mounted to a frame of aluminium and hollow steel tubing the c19 offers all the advantages of the cambium line in a wider width that is suitable for a more upright seated position ideal for touring or city riding features immediately comfortable the construction of cambium saddles works like a hammock and delivers immediate comfort while absorbing vibration and shock performance traditionally