Exceptional support and Comfort. The Invacare® Matrx® PB Posture Backs are contoured to provide midline support and positioning. The extensive range of sizes provides exceptional support and comfort for a variety of customers. Foam Molded foam wraps around shell for maximum comfort and protection Outer cover Moisture resistant and breathable Available in black or Kid*ab*ra print Optional privacy flap is available Sacral/lumbar support: Includes removable positioning pad Back shell Contoured shell provides exceptional midline support and positioning Durable, lightweight ABS back shell includes built-in plate for headrest attachment Hardware “Easy Set” hardware installed and adjusted in minutes – adjustments can be made while user is seated in the wheelchair “Easy Set” Hardware comes standard with the Elite backs. Refer to Hardware page for more details on other hardware ptions.