Abstract: A shoe insert to be used for cooling the foot to be manufactured and sold as pairs of left and right shoe inserts. The insert has a number of components forming a sandwich. The insert has the shape of a shoe, and is partly adjustable in size to fit a range of shoe sizes. So, the inserts may be sold in sizes, for example, small, medium, and large, and these sizes may then be fine tuned to fit a sub-range of shoe sizes. The inner volume is separated by a pressure breakable seam approximately at the instep which ruptures when pressure is applied. The seam effectively divides the interior volume into two compartments. One compartment contains a liquid and the other contains a chemical substance. When the seam is ruptured, the liquid flows from one compartment into the other compartment. When the chemical substance combines with the liquid, an endothermic reaction occurs which causes cooling of the foot. The bottom component of the cushioned layer has round dimples into which a dry chemical can be placed.

Abstract: A shoe insert to be used for heating or cooling the foot. They are to be manufactured and sold as pairs of left and right shoe inserts. The insert has a number of components forming a sandwich within a sandwich. The outer sandwich has the shape of a shoe, and is partly adjustable in size to fit a range of shoe sizes. So, the inserts may be sold in sizes, for example, small, medium, and large, and these sizes may then be fine tuned to fit a sub-range of shoe sizes. The inner sandwich is smaller than the outer sandwich. The inner sandwich is a pouch positioned at the instep which ruptures when pressure is applied. This pouch contains a liquid that can then flow into a cushioned region. The cushioned region contains a chemical, which when combined with the liquid from the pouch, emits heat (exothermic reaction) or absorbs heat (endothermic reaction). An exothermic reaction would heat the foot while an endothermic reaction would cool the foot.