Which type of PPE is NOT mentioned as critical for line workers?

The type of PPE not mentioned as critical for line workers is dust masks. This indicates that while dust masks can be useful in certain situations, they are not deemed essential for line work specifically. Line workers are typically involved in tasks that could expose them to electrical hazards and other specific risks associated with working on or near electrical lines. Therefore, equipment like hard hats, gloves, and safety glasses is emphasized as necessary for protecting against impact, electrical burns, and eye injuries, which are more closely aligned with the job requirements. Dust masks might provide protection in dusty environments, but they are not specifically related to the primary hazards faced by line workers in their roles.