Lenses in high durability polycarbonate mirror finish with 100% hypoallergenic silicone eye cup. UV and anti-fog lens treatment. Slim 100% silicone strap for a better fit. Manual adjustment of the strap at the nape of the neck. Interchangeable bridge Recommended age: +16 3 sizes replaceable for the bridge of the nose Anti-fog treatment Material: silicone and polycarbonate Strap delgado Height: 4.5 cm x Width: 14 cm x Depth: 3.5 cm Weight: 40 gr