EN 166, material with 100 % UV protection, side protection, replaceable visor, adjustable arms & visor.STIHL safety glasses are made from high quality, extra impact-resistant polycarbonate lenses (lens class 1). They offer protection from UVA & UVB radiation & from mechanical dangers. The protective eyewear is available with lenses in a range of colours to suit the task in h&. Clear: Ideal for work inside & in the open Tinted: Ideal in very bright conditions