Saint Laurent Monogram SL 312 M Sunglasses Betsey-Johnson The SP4029's square silhouette works

The SP4029's square silhouette works particularly well for those seeking a modern

These full-rim metal frames are engineered from a lightweight titanium-nickel alloy—the same material NASA developed for missile heat shields—allowing them to flex

these prescription-ready frames blend retro-inspired style with modern sophistication

while the signature logo is engraved on the lens itself

tortoise for warmth

Saint Laurent Monogram SL 312 M Sunglasses Betsey-Johnson The SP4029's square silhouette worksA MODERN HALF RIM SQUARED FEMININE SHAPE. EXTREMELY LIGHTWEIGHT METAL STYLE CONTRASTING THE BOLD YSL LOGO POSITIONED ON THE LENS. SHINY METAL CONSTRUCTION FEATURING REFINED GRADIENT LENSES. THE STYLE IS ENRICHED BY GRADIENT AND COLORED LENSES INSPIRED BY THE HAWAIIAN CHIC MOOD.