Material: Typically constructed from High-density polyethylene (HDPE) or ABS plastic for high-impact resistance.Adjustment System: Features an adjustable strap or wheel ratchet fit system to ensure a secure, customizable head fit.Protection Standards: Many models meet EN 397:2012 standards, providing protection against impact, chemical hazards, and electrical risks.Design Elements: Includes a two-ribs design for structural strength, a sweat-absorbent strip for comfort, and a secure chin strap.Temperature Range: Certified for use in environments ranging from -20°C to 80°C.