The jackson safety sc-6 hard hats are molded from lightweight, dielectric high-density polyethylene (hdpe) material for comfort, impact resistance and high visibility; features a premium 370 series easy grip easy turn ratcheting mechanism. Made from a smooth domed cap-style design, this helmet leaves no crevices for buildup and features a full visor to reduce glare from sun or overhead lighting. The 4-point ratchet suspension provides over 30 adjustment levels between head sizes from 6.5 in. To 8 in. For a comfortable fit; this product additionally includes an extra absorbent brow pad for added convenience.