EFX Bracelets This lot includes 7 Silicone Sport Wristbands, each have two programmed EFX holograms. EFX Wristbands are made of the highest quality non-toxic, 100% medical grade silicone. With a large variety of colors and iconic designs these Certified Authentic Sport Wristbands are a best-selling product and can be seen on professional athletes in every major sport! For balance and energy, while working out... original Retail for $30.00 + tax each!