Blast is exceptionally comfortable and adaptable. Can be worn on top of corrective eyeglasses. Adjustable band with a ball closure. Clear glass with scratch-resistant, dust-free, anti-static coatings. Polycarbonate or acetate, with indirect ventilation. Areas of use: Dust, liquids, gases, molten metals and hot, solid objects. Clear lens, scratch-resistant and dust-free. Foamed plastic.