??Fast & Effective Pain Relief?- Air-Activated Self- Heating pad features an innovative ultra-heat technology to provide up to 10 hours of continuous heat and warming comfort to relieve the menstrual cramps and associated abdominal pain or backache. Stick on the Clothing. For All Skin Types. ? ?Largest, Warmest Patch for Max Pain Relief?- Long & Wide enough (19 x 10 cm = 7.5 x 4 inch) to cover the uterus fully in the temperature of 131-154°F or 55-68°C for maximum pain relief. The ultraheat deeply penetrates to the inner lower abdomen to help the blood flow and relax the uterine muscles. Great for abdominal cramps or lower back pain. ? ?Comfy, Cozy & Safe?- An ultra-thin design conforms to your lower abdomen so that you can hide it under clothes. They are comfortable to wear, self adhesive and stay in place on clothing. ?? Do NOT ATTACH ON THE SKIN. STICK ON THE CLOTHING instead. Must remain attentive while using and check the application area every 2 hours to prevent burns. ? ?Natural Remedy for Menstrual Cramps?- Non-medicated, Air-Activated, Odor-Free heating patch is formulated with iron powder, carbon and ginger. Just open the pouch; the wrap starts to warm on its own then peel & stick it on clothing. Stop taking pills or medication for menstrual pain relief, try the hot patches instead.