Peltier-Effect Water Cooling Vest: Circulating cold water without the need to prepare ice. This is a rather interesting vest with future potential. Purchased on July 3rd and used several times indoors and several times outdoors. Brand: MEDIAID - Type: Cool Vest - Material: Mesh material - Cooling Function: Peltier water cooling - Accessories: Power unit - Adjustable: With straps Thank you for viewing.