We appreciate a spot of integration at RCUK, and the Koo sunnies certainly look a match for the range of helmets Kask make thanks to the various frame colourways available, while they also offer a level of fit customisation we’ve seldom seen before. Each set of sunglasses comes with its own set of two lenses – a dark lens in a colour that matches the frame, as well as a clear lens for more gloomy days in the saddle.