The all-encompassing brightness of glaciers places extra demands on the eyes ,Äì demands that standard sunglasses cannot meet.Product Highlights.Rubber nosepiece and temples stay grippy even when wet.Adjustable temples.Detachable leather side pieces with magnetic.attachment on the temples.Product Description.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.Technical Details.NIVALIS frame dimensions.Width:140 mm Length:160 mm Height:55 mm.Item No.NI1001.