The design of theHourglass center holeThe hourglass center hole with the width of 40MM in the phalanges can avoid the pressure of the phalanges on the blood vessel under the premise of effective support for the ischium. The small-big shape of the hourglass is conducive to gather and spread the air to both sides through the airflow-guide groove and the heat dissipation effect will be better.The hourglass center hole is semi-open. Except for the 60MM distance from the front end, the center hole is throughout the whole saddle. Such a design can meet various application fields, such as mountain bikes and road cars.