This is a unique set of Hawaiian basaltic rocks, which is owned by Quzi. It takes about 3 to 6 months to feed carefully with essential oil and sunshine every day. Black is good for diuresis and dehumidification, and white is good for warming meridians and dredging collaterals. Combined with the hot air of spices in Thai herbal medicine bags, it can penetrate meridians, remove dampness and detoxify. European-style solid essential oil at 42℃ can ignite and activate body energy, enhance immunity, and help the human body to really keep out the cold, prevent cold, drive out cold, dehumidify and replenish body energy in winter!