Many baseball teams, special events and groups use wristbands as a form of identification at their events. They use them to designate special areas that only people wearing the wristband have access to.
Some popular uses are in the areas of VIP tents, Picnic areas, All You Can Eat Wristband and Birthday Parties.
Tyvek Wristbands are the most cost effective and come in a variety of stock colors and patterns. They can also be imprinted with your custom text or logo. They are single use and non-transferrable.
Another type of wristband that is gaining more popularity are the cloth/fabric wristbands. These wristbands are also fully customizable with logos and texts and have an added elegance to them.