wristband
n. countable B1 Intermediate UK //ɹˈɪstbænd// wrist·band
n. a band that you wear around your wrist. It can be a piece of jewelry, a watch, or a plastic band used for an event.
n. a band or strip worn around the wrist. Often used for identification, timekeeping, or decorative purposes.
She wears a colorful wristband to the concert.
The staff members at the festival are required to wear a wristband that shows their access level.
While traditional wristbands were often made of leather or silk, modern versions frequently utilize silicone or RFID technology for functional identification and security purposes.
From wrist + band.