SEAT CUSHION FOR SITTING COMFORT: Effective donut pillow for sitting long hours to make your day more comfortable meaning you can be more productive when it matters. Commonly used to help with tailbone pain, hemorrhoids, post surgery and postpartum essentials. EVEN WEIGHT DISTRIBUTION: The seat pillow is engineered with ComfortSupport foam and BounceBack technology to provide the balance you need between supporting you on the chair surface and the comfort to sit frustration-free. SUITABLE FOR MOST SEATS: Lightweight and portable for use at home and on the go. Use as office chair cushion, car seat cushion, or wheelchair cushion. This donut seat cushion can accommodate a seat with the size of 17.5" x 14", making any hard surface comfortable to use.