Polarlens S4 Sport Sunglasses Set with 2 Interchangeable Lenses + Carrying Case Highly Flexible Grilimid TR90 Frames 3 Interchangeable Lenses: REVO Blue (CAT 3 Filter) Contrast Orange (CAT 1 Filter) and Clear (CAT 0 Filter) UV 400 Protection Anti Fog and ExtremelyLightweight... only 20 grams! Comes in a carrying case for safe and convenient storage