Sundog Prime TrueBlue Sunglasses PRIME features a classic sport frame profile with top and side lens vents to help aid in fog and moisture reduction.TrueBlue branded lens technology incorporates synthetic melanin and ocular lens pigment Unique Blue Light Filtration, Improved Performance, Refined Protection, Enhanced Definition, Maximum Visual Clarity, Superior Glare Reduction, Reduces Visual Fatigue, Flow Through Top Venting Eye Lens width 68mm, Bridge 19mm, Temple 120mm, Height Lens 37mm MaxFlex RILSAN Frame, ContourFLEX Adjustable Megol Nose Pad, Megol Co-Injected Temple Tips, Open Bottom Frame Desig