2nu Halo - Grey/PurpleHalo with Purple Lens Designed for smaller head sizes, this frame, thanks to FlexFoam, also fits normal and slightly larger heads. The Purple Coating offers a green visual effect, enhancing road visibility, making it an excellent choice for driving. These versatile sunglasses are also a great all around choice. The polarized lens boosts color contrast and minimizes glare from surfaces, ensuring top performance in open areas and related sports.