A self-heating patch designed to ease menstrual discomfort with gentle steam & herbal warmth Generates soothing warmth with 40°C steam that lasts for 5 to 8 hours to relax abdominal muscles & reduce cramps Combines iron powder, water, activated carbon, vermiculite & salt to activate natural steam heat without medication or fragrance Delivers comfort using a soft cotton surface developed for sensitive skin & approved by Japanese dermatology tests Promotes circulation by allowing steam to penetrate deeply, helping relieve stiffness & fatigue in the lower abdomen Applies easily with a skin-side nonwoven layer made of polypropylene & polyethylene for a secure & irritation-free experience Suits all skin types including sensitive skin, ideal for use during menstruation or abdominal tension Made in Japan