The Oakley Hydra taps into its surfing heritage with a Razor Blades-inspired semi-rimless shield lens. Featuring the Oakley B1B logo on the temples, Hydra is accentuated by a modern trigger stem design, reminiscent of Razor Blades' origins in surf culture. They feature lightweight comfortable BiO-Matter frames, semi-rimless cylindrical lens shape, and a 3 point fit for all day comfort. One size fits most.