Julbo Bivouak Mountain Sunglasses. The 120-year-old Julbo brand is built from a rich history in alpine-mountaineering, high-altitude and glacier exploration optics. Julbo has been at the forefront of optical and action sports equipment for the mainstream athlete, including those using prescription eyewear. From its headquarters high in the Jura Mountains of France, where the company was founded in 1888, three generations have directed Julbo"s evolution from manufacturer of corrective lenses to global producer of protective eyewear for all active outdoor pursuits. Today, Julbo is an emerging multi-sport eyewear company that makes eyewear for elite outdoor athletes as well as mainstream users. Julbo is fully committed to creating a line of sunglasses with world-renowned optical quality melded with a bold sense of style. Julbo has developed a line of affordable, durable, 100-percent UV protective sunglasses for children. Julbo applies the same technology and innovation to its children"s line that it uses to make eyewear for mountain climbers and sailors and other athletes. Julbo USA is based in Williston, Vermont.The Bivouak - the world"s first sunglasses with magnetic protective shields. Add the magnetic side shields to increase protection against enhanced light reflection, on snow for example, or remove them for regular use. Outdoor sports have met their match with the Bivouak, offering solar protection for any condition. FEATURES: - Base 8 - Weight: 32g - Wide lenses offer optimal coverage. - The magnetic side shields are easy to handle, fast to adapt and very durable. - Front venting: Natural front air flow thanks to the lens shape or mounting structure - Grip tech: Inserts at stem ends for comfort and hold, does not stick to hair Available with Spectron 4, Zebra, or Camel lenses.