All Native Nano 2 sunglasses include 4 sets of lenses for all light conditions. Native Nano 2 Sunglasses - Anti-Ocular Intrusion System Native Nano 2 Sunglasses NANO2 = Nano "Squared" = Squared Lens Shape UV: All lenses offer 100% UV protection. TECH: 4 sets of Interchangeable Lenses, Venting, Cushinol FIT SIZE: Best fits a Large to Extra Large profile WEIGHT: 0.9 oz OFFICIAL site for Native Nano 2 Sunglasses FREE 4 Sets of Interchangeable Lenses Native Deluxe Sunglasses Case FREE Microfiber Lens Cloth FREE Visor Clip FREE Deluxe Sunglasses Retainer Colors of 3 Free Lenses: 1. Orange Crystal: 57% VLT for medium light. 2. Yellow Crystal: 80% VLT for low light. 3. Clear Crystal: 98% VLT for very low to no light.