1Stone and wood material is healthy, hygienic, beneficial, non-toxic, easy to clean and free of sulfur, aniline or other toxins without side effects 2Various stones arranged scientifically are rich in trace element, which can care your foot, promote blood circulation and remove toxins effectively 3Can soothe and activate veins, relax nerves and muscles and eliminate fatigue 4Can release body static to maintain nerves and blood pressure functions 5Can relieve tension to promote sleep