BBB Arc PH Photochromic Sunglasses: Adaptable Vision for Peak PerformanceExperience ultimate visual adaptability and uncompromising performance with the BBB Arc PH Photochromic Sunglasses. Designed for the dedicated adult athlete who demands versatility and clarity, these sunglasses are your single solution for every lighting condition. Say goodbye to swapping lenses or squinting through changing weather, the Arc PH is engineered to react instantly, allowing you to maintain complete focus on the road or trail ahead. Whether you´re setting out for a pre-dawn ride, pushing through the bright midday sun, or finishing your run as dusk settles, your vision remains perfectly optimized and protected.The heart of the Arc PH sunglasses lies in its advanced photochromic lens technology. These intelligent PH lenses seamlessly transition across the full light spectrum, from a virtually clear Category 0 for low-light and overcast conditions to a dark, sun-blocking Category 3 in bright, direct sunlight. This automatic adjustment happens so smoothly you won´t even notice it, ensuring you always have the ideal level of tint for superior depth perception and reduced eye strain. This Photochromic 0-3 capability means you can wear one pair of sunglasses from start to finish, providing a significant advantage in long-distance events, triathlons, or unpredictable mountain weather.Comfort is paramount during intense physical activity, which is why the Arc PH features an exceptionally lightweight design. You´ll barely notice they´re there, eliminating pressure points and fatigue for all-day wearability. This featherlight feel is achieved without compromising on durability. The upper frame is crafted from a cutting-edge, bio-based material, offering a robust and flexible structure with a reduced environmental footprint. It's high performance that you can feel good about.A perfect fit ensures your sunglasses stay exactly where they need to be. The Arc PH introduces a newly designed nose piece that comes with two different rubber sizes, allowing you to customize the fit for your unique facial structure. This ensures a secure, non-slip grip that holds firm even during the most strenuous efforts and bumpiest terrain.Maintain crystal-clear vision no matter the conditions. The lenses are treated with a high-performance anti-fog and oil-repellent coating. The anti-fog treatment prevents condensation from building up when you stop or during humid rides, while the hydrophobic and oleophobic coating causes water, sweat, and oils from fingerprints to bead up and roll right off. This means less time wiping your lenses and more time with an unobstructed, flawless view of your path.Technical Specifications:* Gender / Age: Adult* Lens Type: Photochromic* Frame Construction: Upper frame made from bio-based material* Lens Coatings: With anti-fog and oil-repellent coating for clear vision in all weather