A fantastic off road orientated performance/endurance saddle. Specification Size (mm): 280 x 135 Weight (gr): 194 g Base: Carbon Injection Monocoque Rail: Nack Cover: Microfiber Padding: Light Foam Technology Nack Nano carbon fiber rail Carbon fiber Kevlar & aluminum filaments are placed into theseat-post clamp area treated with the production process called Braided Carbon Rail (BCR). This is done in order to obtain the perfect fusion & uniformity of the severaltype of fibers & materials. The result is a balanced structure which is resistant to wear. It has 7x 9mm oval rails.