The Slendale XS is engineered with a shorter lens profile and a more compact nose bridge, tailored specifically to fit the smallest faces. This design makes it ideal for athletes as young as 6 years old, ensuring they start their journey with optimal comfort and functionality. HiPER Lens is 100% proprietary high-definition lens technology that ramps up contrast, amps up colors and enhances detail so you miss nothing. Light Transmission: 14% Light Filter: CAT 3