This cushion is designed for people who prevent hemorrhoids and after surgery. Its buttocks touch the inner core on both sides to thicken, and the middle part is hollowed out, so that the buttocks are not in contact with the chair and play a role of ventilation. It gathers the buttocks according to the streamlined curve of the human body and releases the pressure on the body. This cushion is designed in two styles according to the different physiological structures of men and women, so that different people can have the most comfortable experience. The inner core is a high-density space memory surface, you can choose ordinary or bamboo charcoal.