The all-encompassing brightness of glaciers places extra demands on the eyes – demands that standard sunglasses cannot meet.Features including extra protection at the sides of the eyes and extra-dark lenses make the Nivalis an optimal choice for glacier use. Adjustable temples ensure a secure fit around the ears, and snap-in hinges improve durability as the frames are less likely to break in a fall. A detachable lanyard can be fixed through pre-formed openings in the frame, giving extra security when worn. Rubber nose pads and temples ensure the glasses stay firmly in place even during strenuous activity. Key Features: Rubber nosepiece and temples stay grippy even when wet,Adjustable temples,Detachable leather side pieces with magnetic attachment on the temples,Snap hinges,Detachable lanyard,Complete UV protection (UV400),. Frame dimensions: Width: 140 mm,Length: 160 mm,Height: 55 mm.