Serengeti Carrara 8294 Sunglasses update the classic pilot silhouette with a metal frame and photochromic, polarized mineral lenses for reliable vision in changing light conditions. Key attributes: Shiny Gunmetal | Metal | Photochromic lenses | Polarized lenses | Ultra-light mineral lens | Spectral control | Prescription-ready | Hidden double flex spring hinge for added comfort | Pilot/aviator silhouette | Hidden double flex spring hinge | Metal frame | Dimensions & fit: Lens width 59 mm | Bridge 13 mm | Temple 135 mm | Medium fit | Composition & care: Metal frame | Ultra-light mineral lens (photochromic, polarized) | Clean lenses with a microfiber cloth and store in the supplied case when not in use.