Abstract: The invention provides a customizable seating support for a seat base that is particularly useful for supporting a physically disabled person in a chair, such as a wheelchair. The seating support includes a posterior portion and a pair of thigh supports that are connected to the posterior portion, via a multi-directional connection, so that the position of at least one thigh support is independently adjustable to tilt upwardly or downwardly or to pivot outwardly relative to the posterior portion to an abducted position. In some embodiments, at least one of the thigh supports may be configured to pivot inwardly relative to the posterior portion to an adducted position.