MTG's Far Infrared Rock Bed Mat, SHIKIBU. Retail price: 138,240 yen. There are some scratches from use, but there are no noticeable scratches or stains, and the condition is relatively good. Product Description: Gentle warmth of a rock bath, "Far Infrared Double Heating" with rock bed kiln stone + plant-based carbon fiber. On the mat surface, 465 "rock bed kiln stones" are placed, and inside, "plant-based carbon fiber," which is made by carbonizing the fibers themselves, is arranged. The double far-infrared rays gently warm the body, allowing you to easily enjoy warm-up activities at home. The double far-infrared rays of the heat-retaining "rock bed kiln stone" and the "plant-based carbon fiber," which boasts a surface area more than four times that of charcoal, warm the body to the core and increase the body temperature. Promotes blood circulation, and is effective for cold sensitivity, lower back pain, stiff shoulders, eye fatigue, insomnia, etc.