Abstract: The present invention comprises a thin layer of a cooling composition having a novel and narrow relative range of components, where such thin layer is maintained as such in a thin sheath for use as a cooling cushion especially for the seat of a sitting human, but may also be used for the back of a reclining human. The use of this cushion is for ambient temperatures at about 75.3.degree. F. (23.degree. C.) and above, i.e., the initial melting temperature for the cooling composition incorporating a specific phase change material.