Full speed ahead. The Smith Shift XL MAG sunglasses are an oversized shield made for maximum coverage and performance on the bike and trail. Their wide-shield coverage maintains full vision at speed while Chroma PopTM brings every detail of the road and trail to life with enhanced contrast and natural colour. Smith MAG interchangeable lenses use a magnetic clip for quick, fingerprint-free lens changes. Combined with a lightweight frame and non-slip nose pads, they stay put through long, hot climbs, fast descents and extended trail time. Features. Vision. Chroma PopTM lenses enhance contrast and natural colour to make the details pop. Light-sensitive, photochromic lenses adapt to changing light conditions. Smith MAG lets you change lenses quickly. Smudge and moisture-resistant coatings for easy cleaning and clear optics. Fit/Integration. Large to XL fit, XL coverage. 5-base cylindrical shield lens curvature. Slight wraparound fit. Colour: black