SportRx Frame Width™ (SFW) is the measurement our Sports Opticians use to find the most accurate fit possible. Unlike most eyewear measurements that have little to do with fit, SFW serves as an indicator for how well a frame or goggle will fit your face. Whether you're hitting the beach for a game of volleyball, cycling through the city, or running on your favorite trail, the Oakley Encoder Strike sunglasses have got you covered. The heritage Oakley shield design has been updated with modern features to create a unique and eye-catching look that's perfect for any activity. The large lens shape provides excellent coverage and protection from the sun, wind, and debris, while the lightweight and durable O Matter™ frame ensures long-lasting comfort and performance. The Oakley Encoder Strike sunglasses are also designed for all-day comfort, so you can focus on your performance and enjoy your activities to the fullest. Featuring Unobtanium® ear socks and nosepads that provide a secure, no-slip fit, you won't have to worry about constantly adjusting your sunglasses. Upgrade your sunglasses game with Oakley Encoder Strike at SportRx and achieve your goals.