Starting with a recycled woven fiber top combined with natural rubber for wet weather protection and comfort~ one of the biggest innovations is the liquid wood nosepiece and saddle plate. Liquid wood is a biodegradable alternative to plastics that delivers a lifetime of durable performance. Finished with just a transparent paint to protect the saddle rails~ the C17 Special Recycled Nylon is our most sustainable bike seat so far. Naturally Flexible Rubber: Our Cambium saddles are made from flexible natural rubber~ harvested from trees. Moves with you: Rubber is a natural substance that reacts to and follows the rider's movements. All-surface shock absorption: When wrapped around the bar~ Brooks Rubber Bar Tape can help absorb the impact of tough terrain. Continuously comfortable: Provides natural comfort for the duration of the ride in all conditions~ over all terrain~ performing consistently over time and through constant use.