The round style is the original and still the most popular. They block 100 percent UVA, B, and C light. Leather side shields and bridge cover, and moldable ear pieces. Hard case included. Spectron 4 lenses block 95% visible light. Wt. 1.4 oz.Classic design offers a comfortable fit and great coverage. Spectron 4 lenses block 95% visible light Polycarbonite lens Lenses block 100% UVABC Metal frame is very durable Loop earpieces for security Leather side shields stay supple even in extremely cold conditions Includes hard carry case.