Features of Longevity jade hot packsEnjoy the real values of hot packs made of longevity jadeThey give a cool sensation due to their moisture at the beginning. Warm. Hot. Cool and happy.the feeling of the skin being heated hot and then turned into a cool sensation-you must give it a try to get feel of it. Warm a hot pack in the microwave oven for 2 minutes, and it will keep your skin moist and smooth in 30 minutes. These are customer's opinions on Longevity jade hot packs.