SIROKO K3 Photochromic Sunglasses: Unrivaled Vision for Every ConditionExperience the pinnacle of optical engineering with the SIROKO K3 Photochromic Sunglasses. The new K3 Donauradweg are among the technology leaders for vision.Optimized performance provided by their ultra-lightweight PC frame of only 27 grams and their interchangeable polarized Special TAC 1.2 photochromic lens. Designed for the most demanding athletes, these sunglasses offer a seamless visual experience, adapting instantly to your environment so you can focus purely on your performance. Say goodbye to swapping lenses or squinting in changing light, the K3 Photochromic is your single, definitive solution for all-day, all-weather clarity.The heart of these elite sunglasses is the advanced photochromic lens. It intelligently transitions from a lighter tint in low-light conditions (Category 1) to a darker shade in bright sunlight (Category 3), ensuring optimal visibility and protection at all times. Whether you´re tackling a long-distance ride that starts in the morning mist and ends in the afternoon sun, or running through shaded trails that open into bright clearings, your vision remains sharp, comfortable, and perfectly adapted. The polarized Special TAC 1.2 lens also drastically reduces glare from reflective surfaces like wet roads, water, and car hoods, enhancing contrast and definition for a safer, more relaxed view.Engineered for maximum comfort and an uncompromising field of view, the K3 features a panoramic, cylindrical lens that offers an expansive, unobstructed perspective. The ultra-lightweight polycarbonate frame ensures a barely-there feel, eliminating pressure points during long hours of wear. To combat fogging during intense efforts, the K3 is equipped with the innovative DrySky+ ventilation system, which promotes continuous airflow to keep your vision crystal clear, even on strenuous climbs or in humid conditions. The fit is fully customizable with adjustable temple tips and a two-position adjustable nose pad, guaranteeing a secure and stable fit for any face shape. Technical Specifications:* Target User: Adult* Lens Type: Photochromic, Polarized, Interchangeable Special TAC 1.2* Light Transmission: Adapts from Category 1 (low light) to Category 3 (bright sun)* Frame Material: Ultra-lightweight Polycarbonate (PC)* Weight: 27 grams* Design: Panoramic cylindrical lens for a wide field of vision* Ventilation: DrySky+ anti-fog system* Included in the box: SIROKO K3 Sunglasses, Hard-shell case, Microfiber pouch, and spare rubber bands for temples and nose pad