New, Unused Kiribai Kairo (Disposable Body Warmer) - For Shoes, Long Type Kairo Size: 20cm Duration: 10 hours Warms the soles of your feet for a long time. Contains 3 pairs x 3 packs I received this as a gift, so I don't know when it was purchased. Please refrain from purchasing if you are concerned. As cold days continue, I think you will be able to use these. Please consider purchasing if you understand the above.