Brooks england cambium c17 saddlebrooks cambium is a range of saddles made from vulcanized natural rubber and organic cotton enhanced by a thin layer of structural textile for added resilience and legendary brooks longevity the uniquely flexible maintenance free waterproof top is designed to follow the riders movements for immediate comfort and ease of use to celebrate the launch of the cambium we have created a limited edition for immediate sale 1000 pieces of the c17 and 200 of the ladies