This is a natural, eco-friendly hand warmer that can be reused in the microwave! It gently warms you up from the core of your body. ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ ｟Size｠ Approximately 16cm x 9cm ｟Materials｠ Brown rice Natural salt (for moisture absorption and preventing deterioration) Medicinal mugwort (Ganghwa Island, Sishigiyomogi) ｟Contents｠ Approximately 140g ｟Heating Time｠ 600W Approximately 30-40 seconds ｟Quantity｠ 1 piece ⚪︎Comes with usage instructions. ●After heating in the microwave, use it to warm your abdomen, lower back, shoulders, etc. Warming up is said to improve blood flow and remove fatigue-causing substances. It can be used to relieve coldness and fatigue, for prenatal and postnatal health management, and as a substitute for a hot water bottle. ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ ⚠️Caution ◎Be careful not to overheat. Continuous use may cause scorching, so please refrain from doing so. ◎It can be used for about a year depending on the usage environment. Please store it in the refrigerator when not in use for a long time. ◎The color and texture may appear slightly different from the actual product. ◎The product has been opened once to check the contents. Please understand. ◎This is a handmade product. ◎For multiple purchases, we will discount 100 yen for each additional item. Please let us know in the comments.