Take it to the limit with Smith's lightweight Redline sunglasses. Polarized lenses shut the door on glare and hydrophilic nose and temple pads ensure a comfortable, non-slip fit. They feature Grilamid TR90 frames: the gold standard for toughness, flexibility and durability. And the interchangeable Carbonic lenses are amazingly scratch-resistant, impact-resistant and ensure you're ready to tackle any conditions, light or dark.