1.Designed for Sedentary PeopleDo you have to sit or drive for long time every day? Are you experiencing tailbone discomfort caused by the hard and flat seat? Our office chair cushion are for you. The seat cushion has a unique patented design, with its surface fitting your buttocks and tailbone, distributing the weight of the human body, thereby reducing the impact of gravity on the tailbone. It's your partner for work or life! 2.Large Seat Cushion for Extra ComfortOur office chair cushion size is 18.31 x15.94 x4.3 inches, which is larger than similar seat cushions. A regular seat cushion may be smaller than the seat, and you may feel an uncomfortable contour. Our larger size memory foam seat cushion is closer to the size of the seat, providing you with full angle support to maintain good posture and natural spine curves. 3. Memory Foam SelectedAs we know, if the office chair seat cushion is too hard, it will worsen the discomfort of the coccyx. After many professional experiments,we adjust the car seat cushion to the most suitable hardness to balance support and comfort. At the same time, the slow rebound technology of quality memory cotton makes the seat cushions will not flatten after a long time of use. 4.Works with Any Chairs NonSlip BottomThere's nothing worse than your office chair cushion sliding around, so we've added a nonslip silicone dots at the cushion's bottom to keep them in place. Car seat cushion has a machinewashable breathable cover, just put the cover in washing machine,you can always have the seat cushion. Whether as a office chair cushion,wheelchair cushion, car seat cushion,meditation cushion, gaming chair cushion, travel seat cushion, it's all your choice. 5. Christmas ChoiceOur seat cushion for office chair is Christmas gift or Year gift for office workers, drivers, or people who sit for long periods of time.Memory foam seat cushion can not only help relieve pressure on the tailbone, but also help improve sitting posture.