Banglong White Outdoor Sports Polarized Sunglasses Cycling Glasses Changeable 3 lenses UV400 Polarized lenses eliminate glare and reduce eye fatigue Polycarbonate Lens Material: Polycarbonate is the extraordinarily durable thermoplastic that's used in bullet proof glass, riot shields and astronaut helmets. It's the ideal material for performance eyewear because of its high impact resistance, inherent UV protection and light weight. All of our lenses are made of polycarbonate. Frames Material: PC composite engineering resin Polarized triacetate lenses are impact and scratch resistant, Lightweight and durable 100% Protection From Harmful UVA and UVB Rays