Latch Alpha presents a bold lens shape and double bridge architecture crafted by blending die-cast aluminum with high density Unobtainium in a frame that clips to your shirt, raising the bar on style. Prizm lenses enhance color, contrast and detail for an optimized experience. HDPolarized: Minimizes glare via technology that produces a comprehensive, single-layered lens (optional). Plutonite lens material offers top UV Protection filtering 100 % of all UVA, UVB up to 400 nm and some of harmful blue light. Glare reduction and tuned light transmission of Iridium lens coating. Optimal precision and impact resistance that meet or exceed ANSI Z80.3 optical and impact standards.