Features: 1. **Instant Warmth**: Our Self-Heating Warm Foot Patches provide immediate heat, perfect for warming cold feet and alleviating discomfort during chilly days or menstrual cramps. Enjoy soothing warmth for 6 to 8 hours! 2. **Easy to Use**: Simply tear off the non-woven fabric sticker, apply the patch to the outside of your foot, and slip on your socks. Experience hassle-free warmth wherever you go! 3. **Portable & Convenient**: Lightweight and compact, these foot pads are ideal for outdoor activities, travel, or home use. Keep your feet warm on the go, no matter the weather! 4. **Menstrual Relief**: Specifically designed to help relieve abdominal and lower back pain during menstruation, providing comfort and warmth when you need it most. 5. **Safe & Effective**: Made with iron powder and activated carbon, our patches are safe for skin contact and provide consistent heat without any electrical components. Perfect for all-day use! Our warm foot patches (1 pair in a bag) contain iron powder and activated carbon. It can generate heat and provide sufficient warmth for the soles of the feet or the body. It is very helpful for women who experience abdominal pain, lower back pain and cold hands and feet during their menstrual period. Its usage method is very simple: Tear off the non-woven fabric sticker; Stick the patch on the outside, put on socks and enjoy the warmth of your feet for 6 to 8 hours. It is convenient to use and can be applied to outdoor sports, providing you with warmth in cold seasons.