Application: Cold - Store in the freezer so that the pack is ready to use in case of in jury - Approximately 1 hour is required to freeze gel - Ideal to use for: Reducing swelling Toothache Temporary relief of headache Reducing fevers Application: Hot - Microwave: Place gel pack into microwave for approximaterly 30 seconds (If the gel pack is at room temperature ) or 1 minute(if the gel pack is frozen) on high power. - After this time, check that the correct temperature has been reached - If not, further exposure should be in 10 second bursts Times are based on A600W microwave Adjust heating times accordimgly to suit the power of your microwave Hot Water - Bring water to boil. - Remove from heat. - And immerse the gel pack for appoximately 4-10 minutes - After 4 minutes, check every 1 minute to see if the correct temperature has been reached - Ideal to use for-temporary relief of muscle aches and pains, back pain, sinusitis and menstrual cramps Caution - Whether used hot or cold, it is advisable to check that the temperature is not too extreme against the skin - It is recommended that the gel pack is wrapped in cloth before applying to skin - Gently wash with neutral soapy water in warm water. Dry before use. Do not machine wash, dry clean or wring - It is best to heat the water instead of the microwave Description 100% brand new and high quality Material: Oxford+Gel Shell Color: Blue + White Capacity: 200ml Size: As the picture shows Package include 1pcs Cold Hot Therapy Notes Please allow 1-3mm error due to manual measurement. The color may be different with the true item due to the screen display, please understand.