MOJO-Advantage Band - 9" Black with Grey The holographic discs used in MOJO energetic wristbands are programmed to work with your body's natural frequencies resulting to help you get the most out of yourself. Wearing MOJO holograms may improve balance, strength, flexibility, energy and focus. MOJO is not about wild claims of being a cure-all, the technology won't work for everyone, but there is plenty of feedback from people it has helped with a whole range of issues including joint and muscle pain, blood circulation, stress, endurance to jetlag, just to name a few. The benefit possibilities from wearing MOJO are endless and since no two bodies are alike, the benefits received are truly unique to each individual. MOJO wristbands are embedded with a holographic infused technology that has been used be elite athletes for years andNOW, this technology is available for the rest ofus! What's my size? MOJO's are available in 3 sizes - 7, 8, & 9" and are fitted with 2 holograms in each band. There is no difference in the wristbands between the Raptor and Advantage - it is purely a design choice. The wristbands are made of surgical grade silicone and will stretch over your hand. They can be worn tight or loose depending on your personal preference. As a rule, 90% of men wear a size 8" band and women a 7" band. The 9" are for very large wrists. Measuring is easy Measure your wrist in inches - if your wrist measures 7.5" then an 8" would be chosen, if your wrist measures exactly 7" then an 8" would still be chosen for comfort. Your MOJO doesn't need to fit tightly or be on any pressure points - it just needs to sit comfortably.