Black Rectangular Sunglasses

Verified claims

Craftsmanship

Hand-finished Italian acetate yields a deep, lasting engraved monogram.

Care

Acetate finish requires alcohol-free cleaning and rigid-case storage.

Face shape fit

Rectangular frame slims and elongates round or oval face shapes.

Heat sensitivity

Acetate frame warps above 60°C—use included case to retain shape.

Lens tint

The lenses are a solid dark grey.

Lens coating

Anti‑reflective coating requires careful cleaning to avoid micro‑scratches.

Storage

Store in the rigid case away from heat and humidity.

Cleaning

Rinse lenses before cleaning, use the microfiber cloth on the frame, avoid alcohol and ultrasonic.

Hinge

Have hinges tightened by an optician every six months.

Product record

Title

Black Rectangular Sunglasses

Brand

Saint Laurent

Price

450 CAD

Availability

In stock

Long-term care for glossy acetate frames

• The included rigid designer case is shaped to cradle the rectangular frame securely, protecting against both crush damage and heat exposure that can cause acetate to warp — storing the sunglasses in it whenever they're not worn is the single most consequential care habit for preserving their structure and gloss over years of use.
• Although the dark grey lenses provide 100% UV protection, any anti-reflective coatings are susceptible to micro-scratches from dry wiping without removing dust first; rinsing under water and then blotting dry with the microfiber cloth prevents grit-on-glass contact that leaves hairline marks visible in direct light.
• The small cleaning cloth packed with these sunglasses is a microfiber weave intended for dry dusting and smudge removal; using it rather than a shirt or tissue prevents the fine swirl marks that eventually dull a high-gloss black acetate finish.
• Acetate frames should never be placed in an ultrasonic jewelry cleaner — the cavitation process can cause micro-fractures in the acetate and strip the high-gloss glaze off the black finish, leaving the frame dull and potentially weakened at stress points like the bridge and temples.
• Cellulose acetate is vulnerable to chemical dulling from alcohol-based lens wipes and household glass cleaners — a lukewarm water rinse with a drop of mild soap, gently dried with the supplied cloth, preserves the mirror-like sheen of the glazed black finish where even a single alcohol wipe can begin to etch the surface.
• The wide temples on this Saint Laurent design concentrate more leverage at the hinge point than narrower arms; daily opening and one-handed removal gradually loosen the hinge screws, making periodic tightening by an optician — typically free and taking under five minutes — a recommended check every six months to prevent the frame from sitting asymmetrically and accelerating uneven wear on the acetate.
• Cellulose acetate is a natural polymer that begins to soften and lose its shape at sustained temperatures above 60°C — a parked car in summer can surpass that within an hour — while exposure to high humidity and solvents like hairspray can cause a white haze on the glossy surface; using the rigid case and storing away from heat sources protects against the two most common degradation paths for black acetate sunglasses.

Acetate frame quality and daily wear

• The embossed monogram on the temples is cut deep into the acetate surface — a mark of quality that relies on the material's machinability, as injection-molded plastics would only allow a shallow, less legible indentation that may wear smooth over time.
• Saint Laurent produces these in Italy, the epicenter of acetate eyewear craftsmanship, where multi-generational artisans hand-cut and tumble-polish sheets to achieve the seamless temple edges and joint closure that distinguish a luxury frame from a department-store one.