NFC slim Tyvek Wristband is made of flexible tyvek and its waterproof and tamper-proof.its soft and no harmless to wrists which can be used for healthcare,public tickets and identification. The embedded NTAG213 chipset is compatible with all NFC-enabled smartphones and all lSO14443A terminals.NFC tyvek wristbands are perfect for leisure.resorts, theme parks, water parks, sports activities and outdoor events.