From the manufacturer's website:
BAND-AID® Brand WATER BLOCK™ Tape firmly secures dressings or bandages to wounds, for advanced first aid protection. Designed to be 100% waterproof, it is durable, and stays on, even when wet, so bandages stay on in the shower or bath without coming loose. This adhesive bandaging tape comes in a convenient roll that keeps the tape clean, and it tears easily by hand, so it can be customized to fit any size bandage.
- 100% waterproof and stays on, even when wet
- Convenient roll that tears easily by hand
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.