In general, most festival wristbands are designed to withstand some exposure to water, but the level of water resistance can vary depending on the type of wristband. Here are some key points to consider:

1. Fabric wristbands: 

These are typically not fully waterproof but can usually handle some moisture. They may become uncomfortable when wet and take time to dry.

2. Plastic/Vinyl wristbands: 

These are more water-resistant and can typically withstand exposure to water without damage.

3. Tyvek wristbands: 

These paper-like wristbands are somewhat water-resistant but not waterproof. Extended exposure to water can cause them to deteriorate.

4. RFID wristbands: 

The electronic components are usually sealed and can withstand some water exposure, but it's best to avoid submerging them for long periods.

5. Security features: 

Some wristbands have special inks or security features that might be affected by water.

6. Adhesive: 

The adhesive used to secure the wristband might weaken when exposed to water, potentially causing the band to fall off.

While most festival wristbands can handle some water exposure (like rain or hand washing), it's generally best to avoid prolonged submersion in water. If you're unsure, check with the festival organizers or the wristband supplier for specific care instructions.

To be safe, try to keep your wristband as dry as possible to ensure it remains intact and functional throughout the event.