EFX ("Effects") is the new hologram technology from the USA. It is applied by numerous top athletes and internationally known personalities. Intended for daily use, the emphasis is put on outstanding quality and appealing design. The wristbands are made of especially tear-proof and skin-tolerant silicone. The carrier for the holograms is the resistant material Mylar, which is also employed for space suits among others. It is characterized by high tensile strength, low water absorption and high electrical volume. All EFX products are subject to strict quality controls and are designed for a long operating life. Opt for the original high-quality EFX Hologram. Size L = Circumference: approx. 20.3 cm