"An effective method for applying localized Hot/Cold therapy. Once chilled or boiled microwaved packs retain their therapeutic value for about thirty minutes. Packs remain soft and pliable even below freezing and moulds to body contours. Application: Heat On Stove Top: Boil 6 - 7 Litre Water Remove from Heat. Immerse Pack for 15 Minutes. Microwave: Before You Begin Flatten the Pack If Pack Is at Room Temperature Expose It for 3 Minutes and Let Stand for 3 Minutes. If More Heat Is Necessary Try Further for 15 Sec with Equal Standing Time or Interval If Frozen Expose It for 4 Minutes and Let Stand for 4 Minutes. If More Heat Is Necessary Try Further for 15 Sec with Equal Standing Time or Interval. Cold Application: Keep Pack in Freezer So That It Is Always Cold and Ready to Use. Please Refrigerate Pack for At least 3 Hours. Use Instructions as Given On the Back of the Pack. Note : If pack is overheated more than the instructions time the pack may get damaged the company is not responsible for any such damage."