Khal Bio-Based RB4472 Violet Havana w/ Dark Brown Lensdream in color. feel the pulse. Expression without a script. Ray Ban Pulse is digital energy for those who defy definition. Model code RB4472 685773 48 20 Khal Bio Based captures the bold energy of Gen Z with its slim, narrow oval sunglasses frames. Crafted from nylon and propionate, the full rim design delivers timeless elegance with a modern edge. Finished with a rich brown sprayed havana front and green solid lenses, these brown sunglasses exude