NFC slim Silicone Wristband is made of flexible silicone and is therefore waterproof. A total of 8 fastening options are available, so that this bracelet can beindividually adjusted to the wearer. The NTAG213 is compatible with all NFC-enabled smartphones and all lSO14443A terminals. NFC silicon wristbands are perfect for leisure complexes,theme parks, water parks, sports activities and outdoor events.