WARNING: DO NOT OVERHEAT. OVERHEATING PRODUCT MAY RESULT IN SKIN BURNS. Due to differences in microwaves, heating time may vary. Please follow heating instructions carefully. Important Heating Instructions & Warnings: 1) Place both mittens side by side in a clean microwave for 30-40 seconds, then massage product to accurately gauge temperature. 2) If additional warmth is desired, heat in 10 second intervals, up to a maximum time of 1 minute and 30 seconds. (massaging or flipping product between each heating to evenly distribute heat). 3) WARNING: Do not overheat. Due to differences in microwave ovens, heating times may vary. Do not leave microwave unattended while heating. 4) After heating, massage product briskly to evenly distribute heat and help avoid hot spots. 5) Apply heated mittens to one or both hands for 10-30 minutes. Do not reheat for 1 hour. 6) When mittens begin to cool, massage product to redistribute warmer interior flaxseed, for continued warming relief. NatraCure Moist Heat Therapy Mittens provide soothing moist heat to cold and painful hands. The warming therapy may help ease pain due to minor arthritis, stiff joints, strains or hand injuries and may also help to increase circulation in the hands and fingers. Mittens easily slide onto hands and are secured with an easily adjustable hook and loop tab. Made of soft polyester and flaxseed, the warming mittens provide maximum warmth and comfort simply by being microwaved for 30-40 seconds for convenient warming treatments. WARNING: DO NOT OVERHEAT. Please carefully follow heating instructions below. Instructions are designed for 1200 Watt microwaves. As per instructions, if using higher wattage microwaves, heat at medium power level only. Do not heat product if flaxseed is exposed or leaking. Make sure there are no oils or food remnants in the microwave before heating.