Genuine Randolph sunglasses !
Today considered as a classic form, sunglasses Concorde are characterized primarily by its "bayonet" branches, suitable for wearing under a helmet, and its special shape lenses with rounded edges. The nose pads are self-adjusting (today, it seems obvious), and hinges are also rounded, to avoid collision with various pieces of equipment. The patented self-locking screws and special alloy complete the frames feature.
But the lenses themselves are also of interest. Made of optical quality glass to avoid distortion, they are hardened and individually tested by impact of a steel ball dropped from a height of 1.27 m (this height, bizarre in Europe, is simply a metric matching of 50-inch).
These lenses meet the following requirements: maximum UV absorption (standard ANSI Z-803), designed to eliminate the direct and indirect glare, prepared and polished to specific anti-distortion standards ; OVST (optimal visible spectrum transmission) - in conditions of strong brightness the "darkness" of lenses allow only 10-18% of light to pass through (an ideal comfort level for most users), impact resistance tested individually.
Frame finish : black matt
Lenses color : gray non-polarised
Size : lenses diameter 57 mm
Availability: one week after the order