No, the wristband you receive in the mail is not a 19+ bracelet. If you are over 19, you will be given a 19+ wristband at the festival gates after being ID’d. Anyone over 19 will have 2 wristbands: the one they initially received by mail, and the second one (19+) received onsite at the festival.
If you are underage and caught inside the festival with a 19+ bracelet on, your bracelet will be confiscated, and you will be removed from the festival.
ID must be carried at all times. 19+ wristband does not replace your ID. IDs will be verified at the gates each day of the festival, and those without IDs will have their 19+ wristband removed.