Ray-Ban - Warren Bio-Based (Medium) – Good See Co。NWT $178 + tax online. Subclass case and cleaning cloth included. Never worn. Stylish and bold. Emerald frames with a modern square design. Perfect for any look. Here’s a fresh new addition to the Ray-Ban bio-based* family. Ray-Ban RB4396 Warren Bio-Based Sunglasses are the next generation of bio-based acetate frames. Combining high-performance technology with bio-based material having 67% bio-based carbon content, this series features a frame crafted from acetate, and comes with brown lenses and transparent green frame.