Which characteristic applies to the term "Waterproof" as per U.S. EPA regulations?

The term "Waterproof" as per U.S. EPA regulations specifically indicates that the material is designed to completely prevent the movement of water during its intended use. This characteristic is critical for ensuring that any pesticides or other chemicals applied remain effective and contained without the risk of dilution or degradation due to moisture exposure.

When a material is classified as waterproof, it means that it will not allow any water infiltration, which is especially important in contexts like pesticide applications, where unintended exposure to water could lead to the loss of efficacy and potential environmental contamination.

The other options describe conditions that do not meet the strict criteria of being waterproof. For example, materials that repel moisture but allow for air circulation may be water-resistant rather than waterproof, and those that allow water to seep through over time don't provide the necessary barrier that waterproof materials are required to maintain. Choices suggesting the ability to wash and reuse without concerns also imply a level of permeability that contradicts the definition of waterproof.