IB22639B refers to a popular model of ultra-polarized women's sunglasses manufactured by the Swiss brand INVU. Key Specifications Frame Design: Cat-eye/butterfly style made of high-quality plastic, often featuring a multi-colored or brown tortoiseshell pattern. Lens Technology: Equipped with 100% UV-absorbent, multi-layered ultra-polarized lenses made from Cellulose Triacetate (TAC). Color Schemes: Popular configurations include blue gunmetal frames with blue gradient lenses or tortoiseshell frames paired with dark grey/black lenses. Lens Width