The constellation Southern Cross (known as Hanaiakamalama in Hawaiian) has been theorized to have been helpful to early navigators for finding the Hawaiian Islands, as it is always visible in the night sky. The Southern Cross polarized wrap sunglasses style was designed to be timeless with a triple-injected nylon frame in three unique frame colours to match any style. Details Lens Material: SuperThin Glass - Provides the absolute crispest optics available. 20% to 32% thinner and lighter than standard glass, it offers the best scratch and solvent resistance. Rx Power Range: +3.00 to -4.50 Face Size: Extra Large