About
Bio-acetate holds color differently than conventional plastic, and on the Ray-Ban RB4397 sunglasses, that material quality registers immediately in the depth of the dark blue lenses and the weight of the thick triple bridge sitting across the frame. The acetate here is drawn from 65% bio-based materials sourced from renewable origins, which changes nothing about how the frame looks and everything about what it represents.
The triple bridge is the defining structural choice. It reads as a reference to mid-century aviator architecture, but the square silhouette pulls it forward, giving the frame a blunt, considered geometry that resists easy categorization. The lenses are bio-nylon, derived in part from castor oil, with 100% UV protection built into the coating. The result is a frame that carries its material story quietly, without broadcasting it.
What makes the RB4397 interesting is the tension between restraint and presence. The proportions are generous without being theatrical, and the 3D detailing on the bridge adds physical dimension that flat acetate frames rarely have. This is a frame designed to be noticed up close rather than from across a room, which is a different kind of confidence.
Ray-Ban's move toward bio-based construction across its lineup signals where the brand is positioning itself for the next decade. The RB4397 is a reasonable entry point into that direction for someone who wants the brand's signature legibility without the retro-roundness of the Wayfarer or the nostalgia of the Clubmaster. It wears as a daily frame, not a statement piece.
