🔥【Fast & Effective Pain Relief】-These Air-Activated Stick-on patches feature an innovative ultra-heat technology to provide 8-10 hours of continuous heat and warming comfort to relieve the menstrual cramps and associated abdominal pain or backaches. Compared to ThermaCare menstrual heat wraps. 🌲【Natural Remedy for Menstrual Cramps】- Non-medicated, air-activated, odor-free heating pad is formulated with premium iron powder, carbon and ginger. Just open the pouch; the wrap starts to warm on its own then peel & stick it on clothing. If you don't like to take pills or medication such as midol, pamprin, advil or ibuprofen, this is the alternative menstrual pain relief to you! 🌡️ 【Largest & Warmest Patch for Max Pain Relief】- Our hot packs are Long & Wide enough (27 x 10 cm = 10.5 x 4 inch) to cover the uterus in the temperature of 55-68°C = 131-154°F for maximum therapeutic relief. The ultraheat deeply penetrates to the inner lower abdomen to help the blood flow and relax the uterine muscles. Great for infertility due to cold uterus, severe dysmenorrheal, abdominal cramps, backache. Can also be used for stomach, neck & shoulder pain.