the microcapsules may be added to the visual camouflage paint and applied simultaneously therewith similarly the microcapsules may be added to a liquid polymer which is then foamed in order to form a foam or may be added to a foam by other means such as skiving in another embodiment of the invention the microcapsules may be mixed in with a liquid rubber prior to curing in other aspects of the invention the mircocapsules may be employed in combination with fabrics and or fibers the microcapsules are added to the resin which is then extruded and cured to form fibers in another embodiment the microcapsules are added to a curable resin that is then applied as a coating to the surface of a substrate such as a fabric in addition the microcapsules may be added to a foamable material which is then applied to the surface of a fabric and foamed thus it will be seen from the foregoing that the addition of microcapsules 10 containing a phase change material 12 is an easily adaptable concept that may take may forms however the particular embodiment will have to be engineered depending on the particular parameters of the application notwithstanding the foregoing this is well within the skill of those trained in field of thermodynamics in experiments that were conducted a piece of cloth containing microencapsulated phase change material was applied to a heated strip and viewed with the forward looking infrared radar flir the strip was not observable by the radar in another experiment a piece of fabric containing microencapsulated phase change material was draped over.