Explore anywhere with Shackle, a frame built for comfortable, everyday use. The full-rim, soft square frame shape boosts Shackle's style-factor while the lightweight O Matter(TM) front ensures durability to support an on-the-go lifestyle. Fit & Design: Lightweight O Matter(TM) front brings durability plus a snug fit for all-day wear The Unobtainium(R) nosepads and slip-on earsocks deliver a solid grip, whether you're exploring uncharted terrain or simply going about your day Technology: Prizm(TM) Lens Technology engineered to enhance color and contrast to see more detail Impact protection: Oakley lenses are designed and tested under extreme high mass and high velocity circumstances to ensure uncompromising protection across a wide range of demanding conditions Additional Details: