The Leffingwell is a full rim, square lensed glass with designs inspired by the craftmanship of surfboards. Oakley’s plant-based BiO Matter frame material is lightweight and durable with subtle branding, while market-leading Prizm technology lets you see with crisp and enhanced clarity.Lens: This lens is suitable for bright light conditions with a tint that increases contrast. The base lens tint is grey. Prizm technology blocks specific wavelengths of light while boosting others to provide maximum contrast and enhanced visibility. This greater clarity results in reduced reaction times and increased performance over a wide range of light conditions.VLT: 14% (CAT 3) - 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. FeaturesFit: Regular - UniversalSize: Large (lens width 57mm bridge height 17mm)Full rim square lens shape Plant-based BiO Matter frame material is lightweight, durable and offers all-day comfort HDO (High Definition Optics) lenses are impact resistant while letting you see with crystal clear clarityPrizm lenses optimise contrast and enhance color enabling you can see in greater detailIridium lens coating reduces glarePlutonite lens material provides UV Protection filtering out 100% of all UVA, UVB up to 400nm Comes complete with a microfibre cleaning cloth