The Katmai is the choice for any adventurer. Lightweight, shatterproof, rugged, and exceptionally clear; they can be trusted to keep your eyes fresh and your vision true. Rx Ready : Compatible with prescription lens requirements. (Contact your local eye-care professional for more details on cost and installation of prescription lens.) Daylight Max : Provides UV protection for optimal performance in bright conditions. No-slip Bridge : Provides all day comfort with no-slip, soft-touch rubber bridge pads. In-Fused Polarized Lenses : Eliminates glare and keeps your eyes fresh on the water and in the field. Limited Lifetime Guarantee : Protects against manufacturer’s defects for the life of the product. Guard-ion Hydrophobic Coating : Sheds dirt and water for a clear, crisp image. Diamondcoat Scratch Resistance : Reduces surface scratches with a hardened surface coating.