"Optic Nerve® Stone Cat Photochromic: The Stone Cat Photochromic sunglasses are a bold performance accessory designed for athletes who require an expansive, uninterrupted field of view during high-motion activities. Best for runners tackling bright morning miles and engaging in outdoor sports who want reliable eye protection and visual clarity. The lightweight frame is constructed with sustainable materials, ensuring a comfortable fit that stays secure during intense movements, making it an essential piece for any active lifestyle.Featuring a GRS Recycled Plastic Frame and Shatter-Resistant Polycarbonate Lens, these sunglasses provide 100% UVA and UVB protection, ensuring your eyes are shielded from harmful rays. The Photochromic Lens adapts to changing light conditions, allowing for seamless transitions from bright to shaded environments. Additionally, the anti-slip temples and nose bridge enhance stability, preventing the sunglasses from bouncing or slipping during vigorous activities. This combination of features sets the Stone Cat apart from standard eyewear, making it a top choice for those who prioritize performance and protection on the go.Why Our Fit Experts Love It""I wore the Stone Cat Photochromic sunglasses during a long trail run, and they performed beautifully. The lenses adjusted perfectly to the changing light, and the fit was so secure that I hardly noticed I was wearing them!"" - Sean, Road Runner Sports Fit Expert, Chula Vista, CAWho It's Best ForThe Stone Cat Photochromic sunglasses are ideal for runners and outdoor enthusiasts who need reliable eye protection during daily training, long runs, and various outdoor activities. Athletes looking for a lightweight, secure fit that adapts to changing light conditions will find these sunglasses to be an excellent addition to their gear. VIP Family members can take the Stone Cat Photochromic sunglasses for a 90-Day test drive with our Perfect Fit Promise."