Slastik Blue Blockers with anti-reflection lenses offer great visual quality and comfort for those who spend many hours in front of a screen. Enjoy the comfort and convenience of the front magnetic connection while wearing or hanging them around your neck. The front connection consists of a 4,800 Gauss strength magnet with antioxidant, anti-sweat and anti-salt water coating. A flexible and adjustable soft headband provides the perfect fit to your head and allows them to be completely folded while the blue light blocking feature helps reduce the effect of blue light on the eyes.