These sunglasses frames are made of polycarbonate material, strong and lightweight. You can hardly feel their presence on your face, but they are indestructible. Its lens is made of polarized and mirror coating. UV protection coating, blocks harmful UVA & UVB Rays. Restore true color, eliminate reflected light and scattered light，make the scenery more clear and soft and protect eyes perfectly.Polycarbonate lens are impact, scratch resistant, durable and unbreakable.Is ideal for motorcycle and cycling bicycle, driving, running, fishing, racing, skiing, climbing, trekking or other outdoor activities,does not put pressure on your nose.