This is a large, handmade rice bran and brown rice kairo (heat pack). It's an eco-friendly kairo with a reusable cover! Grains like brown rice, when heated, release heat containing moisture, and this warmth gently warms the body from the core, boosting immunity and natural healing power! Use it for areas of concern related to "coldness" and "stiffness," such as regulating the autonomic nervous system, stiff shoulders, lower back pain, eye strain, menstrual cramps, and sensitivity to cold. ☆ Total weight: Approximately 640g ☆ Size: Approximately 19 x 28cm ☆ Contents: ・ Niigata Prefecture Sado-produced Koshihikari brown rice ・ Freshly roasted domestic rice bran ・ Seto Inland Sea coarse salt ・ Domestic mugwort & homemade mugwort ・ Domestic bay leaf ・ Homemade chili peppers ☆ Main body fabric: 100% cotton ☆ Cover fabric: 100% cotton flannel♪ The pattern may differ from the sample image. ☆ How to use: Place the kairo with the cover on a plate and heat it in a 500W microwave for about 2 minutes. The warmth will last for about 30 minutes. Adjust the heating time while observing. *Be careful not to overheat! The warmth will last longer if used in bed♪ Please allow about 4 hours between uses. Replace it after about a year. You can use it chilled during the hot season. After purchase, the rice bran will be roasted and the contents will be packed before shipping! ⚠️ We do not accept "discount requests." Discounts will be offered at our discretion. We offer combined shipping discounts and multiple item discounts if possible. Please ask any questions in the comments♪ Please read the profile before purchasing! #WarmthActivation #StiffShoulders #Headache #ColdProtection #SensitivityToCold #LowerBackPain