The Gateway Safety Serpent Safety Helmet is a non-vented helmet with a high-density polethylene shell. The 8-point polyester textile suspension system offers comfort and security. The adjustable nylon suspension provides a precise fit using harness depth settings and the wheel ratchet is easy to use and creates a firm fit. This helmet meets ANSI/ISEA Z89.1, Type I, Class E, G, and C requirements and also meets the ANSI requirements for Reverse Donning and Lower Temperature.