Shop Pre-Owned Saint Laurent Blue Sunglasses from 288.0+ stores, starting at $57. Similar ones also available. On SALE now! Yves Saint Laurent N sunglasses for men. Blue. Size N. Used condition. Saint Laurent, created in the 1960s by the infamous designer Yves Saint Laurent, is a pillar of elegance in the world of luxury and fashion. Thanks to avant-garde collections that elegantly highlight the feminine silhouette, the label has never failed to surprise. The YSL brand has revolutionised French luxury and has become an iconic brand taking the world by storm.