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. A total of 24pieces (1 box; 2 bags/box; 12 pieces/bag). Self -sealed bag design, easy to store.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& 39;s lightweight, breathable and flexible, so your movement won& 39;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.)"