Abstract: A new method of sandwiching evaporative cooling materials such as Polyacrylamide crystals in between two or more outer layers of thin membrane is disclosed. The Polyacrylamide crystals are retained through the heat welding—as opposed to the traditional stitching—of the outer membranes to each other. This allows for the resulting material to be cut into a variety of patterns that can later be sewn or heat welded together to form a variety of cooling products. It also allows for heat-stamping where the heat-stamping machine has patterns that are welded onto the membranes, trapping the evaporative cooling components in one or more patterns, which can be located over specific body regions for effective cooling and/or cushioning and protection of that body region. Patterns can be designed such that negative spaces are created, whereby airflow can be channeled to accelerate the evaporative cooling process over certain body regions.