I’d love to low-key flex with designer sunglasses, but they are the easiest accessory to lose or damage beyond repair. These days, I’m more likely to look for classic frames built from materials that will hold up to haphazard treatment when I’m running around the city. If you want truly unbreakable sunglasses, look for a pair that combines a rugged titanium or flexible TR90 frame with scratch-resistant polycarbonate lenses. That said, you're most likely to find that particular construction in athletic shades so in terms of style, you may be left wanting. Yet, finding the holy grail a pair of shades that effortlessly marries style and durability is possible if you know the materials to look for.
Looking for unbreakable sunglasses with polycarbonate lenses is a great idea. Lenses made of polycarbonate are the most impact resistant lenses on the market, meaning they're going to be less likely to shatter or break. They are 10X more protective than plastic or glass lenses and they provide 100% UV protection, or UV 400 protection. These protect against both UVA and UVB rays.
in addition to them being impact resistant, they are also super lightweight so they're the ideal choice for athletes, pilots, children, and those with jobs in hazardous environments.To enhance polycarbonate lenses, it's often recommended to add an anti-reflective and hydrophobic coating as well as scratch resistance (which is often included).