These are performance eyewear designed to elevate the outdoor athlete. You're not here to enjoy the view. You're here to go higher farther and faster. Eliminate the glare not the adrenaline. Leupold's In-Fused polarized technology uses an advanced manufacturing process that fuses the polarization film between two of the lens layers. This process provides permanent polarized protection that won't scratch or deteriorate over time so you'll never have to worry about slowing down. The TR90 frame is slim sporty and durable. All Leupold Performance Eyewear feature optically decentered lenses. Each lens is custom designed and machined to fit within its frame so that the clearest part of the lens is directly in front of your eye. The result is eyewear that eliminates distortion and maximizes clarity. Guard-ion is a hydrophobic lens coating that sheds dirt and water for a maintenance-free clear crisp image. Daylight Max provides UV protection for optimal performance in bright conditions. DiamondCoat is a hardened surface coating that reduces surface scratches. 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.