Brooks Cambium is a range of saddles made from vulcanized natural rubber and organic cotton canvas 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 rider's movements to deliver immediate comfort and ease of use.The new construction of Cambium Saddles works like a hammock and delivers immediate comfort while absorbing vibration and shock, performance traditionally found only with natural leather saddles.The Cambium owes its remarkably natural look and feel to a woven organic cotton textile. After the vulcanization process, the cotton is then treated with Brooks Numac to completely protect the saddle against the elements.This saddle is assembled from replaceable parts and requires no special tools for servicing. The vulcanized rubber top is practically indestructible; should your Cambium frame suffer an unfortunate accident, repairs can be quickly and easily accomplished by you or your trusted Brooks Dealer of Excellence.