Kosto OTG (over-the-glass) glasses fit comfortably over prescription glasses. Frame colour is black and is full frame. Polycarbonate, clear lenses with antistatic, anti-scratch, and anti-UV lens coating with 99,9 % UV protection. Lightweight nylon temples, adjustable length and pitch with non-slip material for added comfort. Single lens wrapping the eyes for better protection. Integrated nose bridge. Lens thickness : 2.03 mm; weight : 33g.