Though unconventional, Oakley's Clifden sunglasses were engineered for one purpose: mountaineering. Built to protect you again the elements, these frames were designed with side shields and a bridge blocker. On top of that, there is also an integrated leash so you don't have to worry about losing them and can focus on the conditions around you. All of these facets come together with Oakley's PRIZM lenses to create a truly mountain-worthy pair of sunglasses you won't want to go on an adventure without.