Cambium: A layer of delicate meristematic tissue between the inner bark or phloem and the wood or xylem is the name of the new Brooks rubberized saddle. Made from vulcanized natural rubber and organic cotton canvas, with an additional thin layer of structural textile added for protection, they have created a very unique looking and functional saddle. The outer layer is made to be waterproof and combined with a rubber under-layer gives the same comfortable feel usually associated with a well broken in leather saddle. The frame that all this is wrapped around is designed to be completely replaceable by the rider. As will all Brooks saddles this one is designed with longevity in mind – a saddle for life. The saddle shape follows their famous B17 saddle and eventually a narrower version will be on the market that follows the narrower B15 Swallow saddle (one of our favorite looking saddles). The overall look is one of a fine crafted piece of art. I would love to see it in black.