the sito now or never sunglasses feature a stylish round design that's perfect for everyday wear and offers a timeless look. What sets sito sunglasses apart is their commitment to using earth-friendly materials in their construction. The havana acetate used in the frames is plant-based, derived from natural wood pulp and cotton seeds. For exceptional uv protection, this style is fitted with polarised grey lenses that help cut out surface glare, preventing eye strain and fatigue. Sito believes in making an impact with their shades, not just the packaging they come in.