Ray‑Ban 3183 Sunglasses

Frames made of TR90 thermoplastic offer better resistance to chemicals and torsion. Propionate is a nylon-based lightweight, hypoallergenic plastic that is very strong and offers more transparency and gloss than other plastics.

Fixed tint: grey, brown, rose, clear, etc. – it is what it is. Photochromic: adjusts according to the brightness of the environment (i.e., lighter indoors; darker in sunlight). Polarized: absorbs horizontal reflected glare from surfaces, making them good for use on snow or water.