Era Tortoise // ChromaPop Polarized BrownIf you're drawn to the dramatic, the Era comes through with an exaggerated cat eye shape. Despite the large coverage, these Smith sunglasses feel lighter than they look. The bio based frames come with no slip nose pads. Available with your choice of standard Carbonic lenses or ChromaPop polarized lenses that reduce glare and enhance color. Details ChromaPop polarized lenses cut glare and enhance color and contrast Carbonic lenses offer impact