The technology behind the effective yet gentle cooling in TST Sweden's Cooling Vest is a special energy element called Temptech®. The Temptech® C28 element has a 28 °C / 82 °F transition temperature. When the element starts to melt (temperatures above 28 °C / 82 °F) it absorb heat from the body. The heat absorption continues until the element become soft and jelly-like.
Temptech® C28 is a salt hydrate based Phase Change Material that works by charging of energy at 28 °C. Temptech® C28 is delivered in aluminium foil elements. Its main components are sodium sulphate, water and additives.