"High-quality thermoplastic hats and caps feature unique, smooth crown that eliminates the danger of falling objects being trapped by ribs, ridges, or slots. Wearers can adjust head size by using rear-located ratchet mechanism and tilting the headband. All hats and caps include 8-point suspension with ratchet adjustment. All styles are SEI certified to meet ANSI Z89.1-2003, Type 1, Class E, G or C.Note: Available in other colors and suspensions and with Quick-Lok« adapters. SuperEight is also available in a new stronger fiberglass version. Call customer service for more information."