Kaleos Stirling rectangle-frame Sunglasses | Black | FARFETCH AO。Kaleos Luxury Sunglasses. Stirling Collection. Color: Black/Brown. New collection! Retail price: $399, still available on original website for a full price. New condition, original case and duster bag is included. Rectangular-shaped sunglasses. Black acetate front and temples. Brown photochromic lens, base 2, with UV protection and anti-reflective treatment. Category 1-3 lens. Integrated acetate nose pads. Handmade. DETAILS MATERIAL ACETATE FRAME COLOR BLACK REF: A027307 COLOR REF: 07 LENS COLOR BROWN HIGH REDUCTION PHOTOCHROMIC GLASS CATEGORY 3 CATEGORY 1 – Light Lightly tinted lenses engineered for low-luminance environments, such as overcast conditions or reduced daylight. They provide minimal light attenuation while preserving high visual clarity and accurate color perception. CATEGORY 2 – Medium Moderately tinted lenses optimized for intermediate light intensity. Suitable for variable conditions, they ensure balanced light filtration, improved visual comfort., and reliable performance for everyday use. CATEGORY 3 – Dark High-density tinted lenses designed for elevated solar radiation and intense brightness. They deliver superior glare reduction and maximum light filtration, while creating a bold, high-contrast, and reliable performance for everyday use.