Inspired by the tailored structure of men’s suiting, Sferoflex blends traditional styling with patented hinges that promise an exceptionally feel-good fit. These rectangular sunglasses for men look elegantly dashing in black with grey lenses. Crafted from cellulose acetate, a natural plastic derived from cotton, these frames are flexible yet strong as well as hypoallergenic for those with sensitive skin. A metal accent caps sleek, angular temples.