The Bollé Coverall Safety Goggles are cost effective and functional. They protect against impact and chemicals as well as large and fine dust particles. Fitted with an optical class 1 polycarbonate lens that has an anti-scratch and anti-fog coating. The goggles are secured via the adjustable nylon branded strap. They also fit over prescription spectacles. BOLCOVARSI: Sealed Goggles (EN 166/170 1BT 3 4).BOLCOVERSI: Ventilated Goggles (EN 166/170 1BT 3 4 5 K N).The Bollé Coverall Ventilated Safety Goggles have clear lenses that are approved for permanent wear and certified with perfect optical quality 99.9% UVA/UVB protection. With a Platinum coating that has been applied on both surfaces making them highly scratch-resistant (1.4 cd/m²) high resistance to the most aggressive chemicals. It also slows the appearance of fogging. Conforms to EN 166/170 1BT 3 4 5 K N.PTDBOLCOVERSI