... be warm at once 2.pvc+gel,eco-fiendly,reusable packs 3.CE,MSDS,FDA,SGS ,EN71-3 ... , especially very popular in winter. Item pvc instant heat packMatericalpvc(EN71-3 standard)size10*15cmcoloraccording to pantone numberPackage ... flex it, it will activate, and the temprature can heat up to 55 centigrade.2. When reuse it,put ... around it. And wrap up it with cloth when heat it in case be hurt. We have passed ...