... , CE, SGS, FDA, ISO13485...Also known as: cold hot pack, gel pad, gel pack, compress pack, microwavable hot cold pack, etc. MaterialPVC, PE+PA or Nylon+PVCSpec.23X24cm ... -caustic, reusableUse manual:for hot use, soak it into hot water approx. 80-90 degree Celsius for around 3 minutes; for cold use, please place it ...