Buy It Now. Delivery on 7th October 2020. Out of stock £ 129 – £ 139. KOO Demos sunglasses - Black green. Regular price $220.00 Color. There are two new models from the sister brand to Kask: the Spectro sports the kind of oversized design we’ve come to expect from today’s sunglasses, while the Demos has a slightly more subtle, rounder design. He dabbled in cross-country mountain biking too, before returning to drop bar bikes. The sunglasses’ adjustable nose-piece ensures a tailored and stable fit throughout the ride. He was into gravel before it was even invented, riding a cyclocross bike across the South Downs and along muddy paths through the Chilterns. The Koo Demos are striking sunglasses with excellent ventilation and perfect optics. If you’ve noticed some new, extra-large sunnies on the faces of riders in the Trek-Segafredo men’s and women’s teams at the Tour de France and La Course, eyewear supplier Koo has announced details of the new models.