Gunnar Optiks RPG-05005Z RPG Full Rim Advanced Outdoor Glasses with Grey Lens Tint (RPG-05005Z) i-AMP technology, amber lens tint, anti-glare coatings and ultra-pure lens material help provide sharper, clearer vision for serious gamers Made of aluminum-magnesium with an gunmetal frame finish Quad-core hinge design and proper weight balance ensures frame flexibility, durability and long wearing comfort without pressure points or fatigue Wide fit frame ideal for larger heads Comes with a 1-year limited warranty against manufacturing defects