Materials: These helmets are typically manufactured from high-impact resistant materials like High-Density Polyethylene (HDPE) or Acrylonitrile Butadiene Styrene (ABS) plastic.Features: They often include adjustable suspension systems for a comfortable fit, chin straps for security, and vents for airflow to keep the wearer cool.Standards: Many of these safety helmets are designed to meet standards such as EN 397 for impact resistance and protection against falling objects.