Cushions are made from a latex free material that is peel and tear resistant and impermeable to fluids. Cushions are supported by an outer shell that maintains position. Hip-flex adjustment that provides 30 degrees of pivot. Hip-Flex includes 15 degrees hip extension and 15 degrees hip flexion. Soft-Touch material and tool free adjustments. Push Chair Base with 7.5" x 2" Front & 11.5" x 2.5" rear tires.