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/m), 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.