The new dirty tr dynamic saddle is a designed for trial and adventure mountain bikers with our new high impact biofoam plus passing has incredible shock absorbing propertiesthe design of these models well matches with bicycles fitted with large tyres and features protek technology adding silicone inserts on the cover to increase the durability factor and to assure better control the cover has been updated with the new material silkfeel plus our manganese rails ensure light weight and tough pe