Thermoplastic helmets with unique, smooth crown that eliminates the danger of falling objects being trapped by ribs, ridges or slots. Adjust head size by using rear-located ratchet mechanism and tilting the headband. Includes 8-point suspension with ratchet or Tab-Lok™ adjustment. Caps are also available in heavy-duty, lightweight fiberglass for optimum impact resistance, durability and crack resistance, Quick-Lok® mounting blocks for attaching a welding helmet or faceshield, and Swingstrap™ suspension that allows the wearer to convert from front to rear wearing positions without reversing the suspension or headband. Model E-1 full brim hats provide extended protection from the sun, nontoxic splash, dust, dirt and debris. Models E-1 and E-2 are SEI certified to be worn in both the forward and reverse positions to meet ANSI Z89.1 , Type 1, Class E, G or C. The Quick-Lok model is Class C and G approved.