The Evercool Insert can be slid into any concealable or tactical vest and offer cooling effects for up to two hours. Evercool Inserts work by regulating a person's body temperature. Through a "thermostat effect," the inserts can absorb heat to cool or even release stored heat to provide warmth. As a result, sweating, the body's natural reaction to overheating, is often reduced, adding to the comfort factor. Wrapped in Cool-Tek mesh that can be easily added to most tactical and concealable vests, the inserts do not require any refrigeration or other mechanical means for recharging. The panels can simply be removed from the vest and laid flat in a moderately temperate room.