Costa Del Mar class the 580P lenses as their greatest achievement. The grey lens provides a natural contrast perfect for all-around activities. Colour Tortoise Frame with Grey Lens Costa Del Mar class the 580P lenses as their greatest achievement and after 2 years of rigorous testing and refinement Costa feel they have created one of the best polycarbonate lenses on the market. With incredible clarity and durability they are 'the clearest visual experience on the planet'. Features 100% Polarisation efficiently eliminates reflective glare and reduces eye strain. 100% UV light blockage for max protection. Produces brighter, more dense colours for greater definition Lightweight, impact and scratch resistant Comfortable medium fit. Integral hinge. Heavy-duty TR 90 nylon frames. Includes hard case.