・ Purchased on Amazon, but I tried it once and have no use for it, so I'm selling it. ・ It's practically new, as it's been stored in the box. ・ Remove the cooling pad from the vest and chill it in the refrigerator or freezer for about 30 minutes, then insert it back into the vest. It gets very cold. ・ This is a great product for people who work outdoors. ・ It lasts for 2 to 6 hours. ・ Reusable. #Cooling Vest # Instant Cooling PCM Cooling Material