Abstract: A seat cushion assembly for an aircraft includes a base member with a recess having an upwardly facing lower surface that includes a plurality of spaced apart, elongated continuous first ridges extending upward from the lower surface of the recess and laterally towards its opposite sidewalls. The plurality of first ridges are spaced apart from front to rear relative to the seat cushion assembly to define a plurality of first grooves that extend laterally towards the opposite sidewalls. A central cushion member is positioned within the recess and is configured in a complimentary manner to be received within the recess of the base member. The base member is formed of a resilient foam material that is more rigid than the foam material of which the central cushion member is formed. A laterally extending hole is located in one of the base member or the central cushion member.