This set includes a heater bag and stones, allowing you to easily experience hot stone therapy at home. Heater Bag Set Width 17cm x Height 22cm (internal heater bag) S-Rank Stones (Basalt) x 2 (4.7cm x 6.7cm) Face-specific stones specialized for hot and cold care! Made with high-density, S-rank natural basalt, with a fine particle polishing finish for a smooth feel on the skin. ★ Cool for puffiness care ★ Warm for improved circulation and relaxation ★ Fits perfectly on the face line High-quality stones used by professional therapists, taking your daily self-care to the next level. ・ Usage examples: Cool in the refrigerator for morning puffiness care, warm in lukewarm water for evening relaxation ・ Material: S-rank natural basalt (fine particle polished) Place the stones in the heater bag and plug it in. The stones inside the heater bag will accumulate heat. You can use the stones alone or in combination with oil massage for effective results. For sagging and tightening of the face and neck. For shaping the contours of the face and neck. For reducing dark circles under the eyes, etc. The stones (basalt) are made from volcanic lava. They excel at heat retention and are recognized for numerous effects, including far-infrared effects, healing effects, and the effects of natural geothermal energy. Therefore, they have been treasured as mystical stones by Native Americans and have been passed down to the present day. Health Natural healing power Natural