BOCCA SONG 1 Eyeglasses by Face A Face. Color: Matte Prussian Blue (9134) FACE A FACE glasses are at the cutting edge of design. Every frame is meticulously crafted by artisans using only the highest-quality materials: from 100% organic acetate to space-grade titanium. The resulting glasses are durable, lightweight, flexible, hypoallergenic, and most important of all, comfortable. And once coated in the exclusive FACE A FACE color palette, they are nothing short of magic. Full of spirit, light and personality, the spectacles cultivate boldness and vitality.