FT333 by Bertoni Italy sunglasses can be easly converted into goggles. The lenses are treated with a special resin which removes the condensation formed above the surface (Hot or Cold). These glasses are convertible into goggles, making it ideal for sports, the branches can be changed quickly with the adjustables cord. anti-scratch mousse. This is a support for prescription glasses. Perfect for all sports and especially for bikers and free flying.