While foam adhesive bandages are generally water-resistant, they may not be fully waterproof. The adhesive backing is designed to maintain its grip even when exposed to moisture, making these bandages suitable for use in wet or humid conditions. However, prolonged exposure to water may eventually weaken the adhesive or cause the bandage to become saturated, compromising its effectiveness.
So it is recommended to change the foam bandage after it is getting wet
For more details about the products, please refer to
https://www.chinabandages.com/bandages/adhesive-bandages/foam-adhesive-bandage.html