The conventional posture correction cushions are mainly a donut cushion of a round shape like a perineal cushion used for postpartum cooking, or a shape made from the shape of a hip to emphasize comfort. In particular, cushioning materials are often made of soft materials for comfortable seating. For the cushioning cushion to function properly, it is better to feel uncomfortable when sitting in the wrong position rather than being comfortable.To improve the disadvantages, the basic shape of the donut cushion is ergonomically designed through the scientific analysis according to the Korean body shape and the human body dimensions and it has three related design patents. It has a ventilation hole that does not take up sweat even when sitting for a long time. It also uses environmentally friendly natural dyes to add antimicrobial and anti seizing functions. It is also popular as a cushion for perineal occlusion. It is widely used as office cushion for office workers.