The Trek Cameleon Sunglasses achieve optimum performance while moving fast in extreme environments by providing highly technical, yet lightweight eyewear. For those committed to the outdoors via mountaineering, climbing and trail running, the sunglasses offer the perfect combination of technical mountaineering principles and lightweight performance ergonomics. Detachable shields block lateral rays from intense glare as well as offer superior ventilation when necessary. Julbo's Flex Nose design and 360-degree adjustable temples provide optimum hold. The Cameleon lens provides optimal visibility and protection against intense sunlight from desert to glacier conditions.