The 3-Rib 911H is a full brim hard hat with a 6-point Flex-Gear ratchet suspension, designed to protect the head from falling objects and bumps into stationary objects in high heat environments. The 911H includes a suspension that drops below the nape of the head, improving retention. Connect an optional chinstrap to ensure the hat remains on the head during a slip, trip or fall event. Ideal for utilities, welding, foundries and steel mills, where exposure to high temperatures can be present. The Bullard Model 911H is a full brim hard hat designed specifically for high heat applications. It is offered with the option of either a pinlock or ratchet suspension which features a replaceable padded cotton brow pad. The suspension system has six points of attachment with six separate keys for a secure fit and 1 in wide crown straps for comfort.