Specifically for Sports Enthusiasts -High anion -Integrated Molding -Waterproof & Washable Multifunction Bio Silicone Emited Strong Negative Ions, Except The Same Anion Density Level as The Previous Products, RHINO Series Contains Germanium Minerals, Which can Reduce Skin Sensitivity Significantly. Moreover, The Surface of The Bracelet Presents a Shining Silver Color in The Sunlight, Highlighting Your Unique Personality.