A seating system, particularly suited for personal mobility vehicles, such as wheelchairs, that includes a seat cushion having pressure relieving properties and enhanced thermal absorption properties. The seat cushion includes a thixotropic fluid contained within a flexible envelope. The thixotropic fluid includes a phase change material that enhances the thermal absorption properties of the seat cushion to increase thermal absorption from a seated user to provide a reduced temperature sensory effect. The thixotropic fluid further includes a thermal conduction medium that facilitates heat distribution to the phase change material.