Quick Self Heating Hand Warming Artifact Breaking Heat Portable Reusable Hand Warming Treasure 2PC 100ML Feature: Material: PVC+sodium acetate+metal Hold the bag with hand, hold the heating sheet in the bag with the thumb and finger of the other hand, press it up and down a few times, the liquid in the bag will immediately begin to turn into a solid and heat. The bag body gradually becomes cold. If you want to use it again, put it in boiling water and heat it for about 3-5 minutes. All the solids in the bag become liquid, and you can take it out for use. The highest temperature can about 60 degrees Celsius, and the maintenance time is 30-60 minutes. Can be used continuously. Product size: as shown in the figure, about 10x12cm Notes: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness allow slight manual measurement deviation for the data. Package Content: 2 x Hand Warmer