EFX Performance is excited to introduce the new line of Warner Brothers licensed products. The best selling Silicone Sport Wristbands are now featuring your favorite Harry Potter Houses with custom Harry Potter packaging!
Each Wristband have two programmed EFX Performance holograms embedded with frequency technology designed to work with your body. Made of the highest quality non-toxic, 100% medical grade silicone.
You can choose size options: M (7 inch) and L (8 inch).