New, unopened. Ketsuryu Kaizen (Blood Circulation Improvement) Clothes-Attachable Koshi Hotton, 10 sheets. Warmth, Cold Relief. Disposable heat pack that alleviates lower back pain and neuralgia with a warming effect of approximately 48 degrees Celsius. - Product Name: Painful Lower Back Pain, Neuralgia Koshi Hotton - Temperature: Approximately 48 degrees Celsius - Contents: 10 sheets - Made in Japan - How to use: Attach to clothing Expiration date: 2026.4 Although it is a new, unopened item, please understand that it has been stored at home. When shipping, we will open only the outer bag due to thickness, so please be aware of this. Kobayashi Pharmaceutical Co., Ltd. Ketsuryu Kaizen Koshi Hotton 10 sheets Brand: Kobayashi Pharmaceutical