Nanjing Tongrentang 7-Herb Steam Foot Warmers – A traditional Chinese medicine (TCM) brand since 1669, blending ancient herbal wisdom with modern convenience. These self-heating foot patches use 7 medicinal herbs (like mugwort) to stimulate acupoints (Sanyinjiao, Yongquan), promoting circulation, dispelling dampness, and relieving fatigue. Each patch provides 8+ hours of gentle heat (40-50°C), ideal for cold nights, office use, or menstrual comfort. No-mess, portable, and drug-free—perfect for women seeking natural warmth & wellness.