The Embark Photochromic Mirror S1-4 sports glasses from Smith are a highly advanced pair of glasses specifically designed for outdoor activities such as ski touring and mountaineering. Weighing 560 grams, they offer both stability and comfort for extended wear. The glasses feature a matte black frame that is not only stylish but also boasts a robust construction. The blue lenses are equipped with photochromic technology that adapts to varying light conditions, providing a variable light transmission (VLT) of 45-7%. This allows for optimal visibility in changing weather conditions, especially on sunny days. The S4 tint levels are ideal for sunny environments, making these glasses an excellent choice for athletes who venture into the mountains. The Embark sports glasses are aimed at adults and are suitable for both women and men, making them a versatile option for all outdoor enthusiasts.