Energy Stone Eye Cover Terahertz Ball Cold Hot Healing Eye Care Cover for Daily Sleeping and Anxiety Relief f74 1Cold Hot Healing: This eye cover uses terahertz stone, which has good thermal conductivity, can be quickly heated or cooled for healing, providing a relaxing and soothing effect. 2Eye Fatigue Relief: Utilize the energy of terahertz waves to irritate acupoints and nerves around the eyes, promote the circulation of the blood, alleviate eye fatigue and discomfort. 3Visual Improvement: Terahertz stone eye cover regulates the balance of the human electromagnetic field, irritate the visual nerves and center, and promote relaxation of eye muscles. 4Comfortable Wear: Adopting safe round beads design, this terahertz eye cover will not scratch or damage the skin. With ergonomic design, which can fit your facial outline well. 5Portable Design: This energy stone eye cover is compact and lightweight, convenient to use, carry, and store, making it convenient for home, office, and travel use.