... 3.Reusable 4. non-toxic,6P This is PVC + Nylon Cold and hot compressHot cold pack Application ... the power of your microwave) Hot Water:1.Bring water to the boil,remove from the heat ... ) if it hasn't, return to the water and check again after a minute, Repeat until ... boiling water.. Sinusitis and menstrual cramps.Contents: Trimethylene glycol, CMC, Water bear shape hot cold pack, nylon with PVC material