Our Align 5000 Negative Ion Wristbands are made of Surgical Silicone with a single stainless steel clasp. In the band there is a holographic balance disk charged with frequencies that match the earths natural frequencies. The silicone band itself is combined with minerals that release 5000 negative ions. The negative ions have been proven to help with arthritis, headaches, migraines, back and knee pain and nephropathy. As well as high blood pressure, circulation, sleep and anxiety.