... Heat. 2.Promote Blood Circulation. 3.Negative Oxide Ion,Clean the Air. 4.Several Minerals,Green and Natural. Depending on ... natural minerals. It concentrates far-infrared ray, Negative oxide ion, sweat stream and other functions, having very good effect ... and immunity. 2. Negative Oxide Ion, Clean the AirNegative oxide ion called “Air vitamin”, it could clean the air, and likes food vitamin, ...