Boundary | Matte Black | GrayWith a name like Boundary, these sunglasses are great at bridging the gaps. Like the kid who can sit at any school lunch table, they're easygoing enough to work in a variety of situations. The rectangular frames stand out thanks to their flattering shape. As with all Suncloud shades, their polarized lenses bump up contrast and block out glare. DETAILS Polarized polycarbonate injection molded lenses 4 base lens curvature Evolve bio based frame material