The S51R standard model hard hat from Bullard combines comfort and rigidity, providing you with the utmost protection. It features a shell that's constructed of high-density polyethylene to deflect falling debris and keep you safe. Its flat front and low profile design offer you maximum safety, and you can even accessorize with its available slots. This Bullard Cap Style Rain Trough hard hat also features a rain trough, and 4 point Flex-Gear ratchet suspension with poly brow pad. It meets/exceeds ANSI Z89.1-2003, Type 1, Class E and G and CSA z94.1-2005, Type 1, Class E and G requirements.