For those fans of substance, this frame will not fold four different ways into a square the size of a Starburst. D28 is a hearty helping of precision-cut, 100% acetate with Izquierda and Derecha laser-etched across the top in case you forget which side is left and which is right. - Proprietary frq near-clear lenses are infused with blue light blocking technology to reduce eyestrain and improve sleep. - Lenses include anti-reflective, scratch-resistant coating. - Premium, bio-based acetate frame with 5-barrel industrial hinges. D28 Reading/Bluelight Glasses - Heritage Green