The Trek is one of Julbo's masterpieces. It is designed to perform at optimum levels in whatever extreme environmental conditions by being a highly technical yet lightweight eyewear. Trek is the perfect gear for anyone who is active in mountaineering, climbing and trail running . The Trek perfectly combines technical mountaineering principles and ultimate performance ergonomics with category 4 lenses with flash anti-reflection coating. These sunglasses feature a set of detachable shields that block harmful UV rays when the exposure is high which can easily be removed when more ventilation is desired. Julbo finishes this piece off with its Flex nose piece and 360 degrees adjustable temples.