The Gunnar Optiks ST003-C012 Emissary Semi-Rimless Advanced Computer Glasses is an excellent "out-of-the-box" solution to improve your visual performance and reduce eye fatigue for those with 20/20 vision. Eyestrain, visual stress and dry eyes can be caused by extended periods of digital screen viewing and office lighting. Gunnar's digital eyewear filters out the harsh, high-energy part of the spectrum and creates a more relaxed viewing experience to help your eyes focus more naturally. The amber lens tint, anti-glare coatings and ultra-pure lens material help provide sharper, clearer vision. Gunnar's i-AMP lens technology is specifically engineered to reduce digital eyestrain and enhance viewing detail so you can focus longer, work more efficiently and feel more comfortable. Made of aluminum-magnesium with a graphite frame finish, the Emissary optics is designed to generate proper strength and optical stability through a hybrid lightweight metal alloy. The lightweight construction and proper weight balance guarantee longwearing comfort without pressure points or fatigue. The unique squared off lenses and semi-rimless frame design minimizes peripheral distractions. Hidden spring hinges flex to ergonomically fit a wide variety of head and face shapes. Soft thermoplastic rubber tipped temples grip lightly to ensure proper location of the optics without slippage and adjustable silicone nose pads articulate in (3) dimensions to properly fit and comfortably secure eyewear in place. Squared off lenses for an angular look, the Emissary is inspired by the past with an eye toward the future. The Gunnar Optiks ST003-C012 Emissary Semi-Rimless Advanced Computer Glasses comes with a 1-year limited warranty against manufacturing defects. GUNNAR Advanced Computer Eyewear is designed to combat issues like harsh fluorescent light, glare, digital screens and ambient air currents that cause your eyes to dry out. Let GUNNAR create a more stylish, comfortable and rich visual experience.