Serengeti Positano 8370 Sunglasses blend a lightweight, shape‑memory TR90 frame with photochromic, polarized mineral glass lenses for consistent, glare‑free vision in changing light. Ideal for everyday wear and outdoor use where clear sight and comfort matter. Key attributes: Black | Nylon (TR90) | Polarized lenses | Photochromic lenses | Mineral glass lenses | UV protection | Spring/flex hinges | Shape-memory frame for durability and fit | Modified square/rectangular shape | Full-rim frame | Matte finish | Sculpted temples | Dimensions & fit: Lens width: 56 mm | Bridge: 16 mm | Temple: 135 mm | Medium to medium-plus fit | Composition & care: Nylon (TR90) frame | Mineral glass lenses | Wipe lenses with a microfiber cloth and lens cleaner when needed; store in the protective case when not in use.