Adjustable closure

Thermoplastic Elastomer (TPE) frame

Polycarbonate lens

UV Protection Coating coating

✔UV400 PROTECTIVE LENSES: Our photochromic sunglasses adopt safety and impact resistance UV400 protection coating PC lenses, blocks harmful UVA & UVB Rays and protect your eyes from sand, heavy wind, and strong sunlight

✔PHOTOCHROMIC TECHNOLOGY: ROCKBROS sunglasses transition lens can automatically change from clear to dark gray in response to the intensity of the ultraviolet, effectively maintain a suitable brightness to protect your eyes in strong sunshine

✔INTERCHANGEABLE ARM & STRAP: The specially designed stress resistant TR90 frame can meetmost of your outdoor sports needs. And side arms can be unclipped and exchanged for the retainer strap to add more safety for extreme sports