The Squad uses a semi-rimless style frame and cylindrical lens resulting in a stylish minimalist look. With Smith\'s key technologies used and complete with two lenses, you are set for all conditions you are likely to encounter on the mountain.Lens: ChromaPop Sun Black + YellowVLT: 12% (CAT 3) + 69% (CAT 1)Size: MediumLens Shape: CylindricalMain LensChromaPop Sun Black – With a 12% VLT this lens is suited for very bright cloudless days on the mountain and higher altitudes where maximum protection is required.  Bonus LensYellow – With a 69% VLT this lens is at its optimum in heavily overcast and snowy conditions.Visual Light Transmission, VLT, refers to the amount of light that penetrates a lens. A low percentage means less light passes through and a higher percentage lets an increased amount of light through. A lens with a lower VLT rating is better for bright conditions, where as one with a higher VLT is more suited for overcast and snowy days.