This eco-friendly heat pack can be warmed in the microwave and used repeatedly. Unlike rice husk heat packs, this one has no granules, and the addition of makomo (a type of aquatic plant) makes it lighter and fluffier to use. The makomo in the heat pack itself is said to have the property of absorbing and nullifying energy, while the linen outer cover is said to have the property of providing energy. The linen and makomo are thus balanced in yin and yang. Dried makomo is said to purify a space just by being placed in a room. It's appealing that it affects not only the body but also the mind. ◎ Resets negative energy ◎ Raises your vibration It has a significant impact on invisible energy and "ki" (life force). ☆ The cover can be removed and washed (100% linen) ~Size and Weight~ Approx. 8cm x 18cm / Approx. 100g ~Materials~ Rice bran (provides gentle moisture to the skin) Makomo (provides breathability and a comfortable purifying effect) Natural coarse salt (maintains stable heat) Rosemary (for fragrance) Inner fabric: 100% organic cotton Outer cover: 100% linen ~How to Use~ Place the heat pack with the cover on a plate and warm it in a 600W microwave for about 1 minute. The warmth will last for about 30 minutes. Adjust the heating time as needed. In the hot season, you can cool it in the refrigerator or freezer and use it. * After it cools down, reheat it after at least 4-5 hours. ~Various Uses~ ☆ The "Tanden" (the area just below the navel) is considered the "center of the body" and the "source of ki" in Eastern medicine and breathing techniques. Warming this area can be expected to have various physical and mental effects. ☆ Warming the eyes and the surrounding area improves blood flow, relieves eye fatigue, and relaxes you. A cold eye pillow is also effective when your eyes are bloodshot or when you have itchy fatigue. ◎ Using it with a lap blanket or blanket will extend the warming time. ◎ It can also be used as a cold pack by cooling it. ~Cautions~ ◎ 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 using it for a long time. ◎ Because it is handmade, there may be slight individual differences in shape and weight. ~Regarding Purchase~ ◆ Please specify the color of the outer cover (blue or green). ◆ We offer a discount for multiple purchases when shipped together.