NATURALHeat patches for pain relief are made from natural Wormwood, with a self-heating pain relief patch design. 12 hours long-lasting and works within minutes, safe and non-irritating, without any addiction. RELIEVEWhether you are an office worker, driver, athlete, elderly or a housewife, you can use this joint relief patch to relieve a variety of discomforts. We suggest that using for 8-12hours/time, 5 times/week. LIGHTWEIGHT & BREATHABLEWipe the sore painful skin with lukewarm water before each use, then remove the protective film and apply the pain relief patch to the painful area. It's lightweight, breathable and flexible, so your movement won't be compromised. TARGETEDMeasuring 5.91" x 3.54", designed for pain relief for up to 12 hours at a time. (Note: Due to physical differences, some people may experience burning sensation or redness after use, which is a normal phenomenon. After a short period of tolerance, the expected relief effect can be achieved.)