Lens material catagory

1 AC lens(Acrylic): Cheap,easy to fracture and could not enter USA market

2 PC lens(Polycarbonate): Used widely and impact-resistant ( Enter USA market )

3 Polarized lens: 0.74--1.50mm,Used widely and polarized function

4 CR39 lens: 1.80--2.20mm, Used mostly in acetate sunglasses

5 Nylon lens: 1.80--2.20mm, Recycle and ultralight, used mostly in sports safety sunglasses