Saint Laurent
Monogram Massive Square Sunglasses
The Saint Laurent Monogram Massive Square Sunglasses are acetate-frame sunglasses featuring a square silhouette, metal YSL monogram detailing on the temples, and level 3 UV-protective nylon lenses. They are designed for sun protection and everyday wear, with an eye width of 57 mm, bridge width of 17 mm, and temple length of 145 mm. Made in Japan, each pair includes a designer case and cleaning cloth.
- Material
- Acetate frame
- Gender
- unisex
- Style
- edgy, classic, minimal
- Category
- Apparel & Accessories > Clothing Accessories > Sunglasses
Specifications
Rock-inspired refined square acetate sunglasses with YSL monogram and UV protection.
Acetate frame, level 3 UV protection, metallic YSL signature, includes designer case and cleaning cloth, made in Japan.
- Material
- Acetate frame
- Style
- edgy, classic, minimal
- Occasion
- vacation, beach-day, concert, everyday
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing Accessories > Sunglasses
Additional Attributes
- Acetate frame
- Square shape
- Level 3 UV protection
- Metallic YSL signature on temples
- Designer case included
- Cleaning cloth included
- Made in Japan
- Eye width: 57 mm
- Bridge: 17 mm
- Temple length: 145 mm
Product Insights
The Saint Laurent Monogram Massive Square Sunglasses combine Sabae Japanese craftsmanship—over 200 steps and multi-day hand-polishing—with a heat-moldable, through-dyed acetate frame that is hypoallergenic, nickel-free, and snap-resistant for longevity. Low-density nylon keeps the oversized silhouette comfortable and slip-free, while the Casandre monogram (a metal emblem from 1961) and temple inscription anchor the design. Level 3 UV400 protection blocks 82–92% of visible light, ensuring full UVA/UVB coverage and clear LCD screen readability, but trades polarized glare reduction for color accuracy and frame identity; not suited for low light.
Verified claims
- Casandre monogram
- The Casandre monogram on the hinge is a metal emblem from 1961, also on handbags, and paired with a temple inscription.
- Craftsmanship
- Made in Japan in Sabae, Fukui, these frames pass through 200+ manual production steps and multi-day hand-polishing, with artisan certification.
- Heat adjustment
- Acetate frame can be heat‑adjusted by an optician for a slip‑free, comfortable fit.
- Through-dyed color
- Through-dyed acetate embeds the pigment throughout the frame, so the black color won't chip or wear off at stress points like the temple hinges or nose bridge.
- Durability
- Acetate's snap resistance and through-dyed color, along with shatterproof nylon lenses, contribute to a longer service life.
- Hypoallergenic
- Acetate frame is hypoallergenic and nickel-free, preventing skin reactions.
- Snap resistance
- Acetate frame flexes under stress rather than snapping, reducing breakage risk.
- Weight
- Low-density nylon (1.01 g/cm³) keeps the oversized square frame comfortable and slip-free.
- Fit & comfort
- Lightweight nylon and heat-moldable acetate keep the oversized frame secure.
- UV protection
- Level 3 rating means the lenses provide full UVA/UVB protection, classified as ISO 12312-1 Category 3.
- Bright light
- Level 3 is Category 3, the darkest lens category legally permitted for driving in the UK and EU; it transmits 8–18% of visible light (blocking 82–92%), making the lenses suited to bright sun and daytime driving but too dark for low-light use.
- Glare reduction
- Level 3 lenses block 82–92% of visible light, reducing glare from reflective surfaces such as water, sand, and snow.
- Polarization
- The product information specifies Level 3 UV protection but does not state whether the lenses are polarized.
- Frame silhouette
- The frame has a rigid-looking oversized square acetate silhouette with metallic YSL monogram detailing on the temples.
- Narrow-face fit
- With a 57 mm eye width and 17 mm bridge, the total frame width lands around 131 mm before the endpieces, placing it in the large/XL range; on a narrower face it will extend past the temples and tends to slip because the acetate frame uses fixed molded nose pads rather than adjustable ones.
- Prescription compatibility
- Full-rim acetate frames like these can generally be fitted with prescription lenses by an optician, and Saint Laurent acetate models are commonly sold as RX-adaptable, though the listing does not state RX compatibility.
- Weight reference
- The listing does not publish a weight for this frame; the closest reference is Saint Laurent's comparable square acetate model, the SL M170, at about 40 g. Acetate temples grip through frame tension and can be heat-adjusted at an optician for a firmer hold; no spring hinges are specified.
- Care and heat exposure
- Because acetate is a thermoplastic, prolonged heat such as a hot car dashboard can soften and warp the frame; store the sunglasses in the included case and out of direct sun. Clean with the included polishing cloth and lukewarm water with mild soap, avoiding paper towels, alcohol, and household cleaners.
- Japan production vs Italy
- Saint Laurent builds these in Japan, and the Japan origin generally signals high-grade acetate frame construction rather than a downgrade from Italian-made pairs; the lens material and optical quality come from the nylon lens itself, not the assembly country.
- Lens clarity
- The nylon lenses have an Abbe value of about 52, well above polycarbonate's roughly 30, so the 57 mm squared-off periphery stays nearly free of color fringing and as sharp as the optical center.
- Chemical resistance
- The nylon lenses resist degradation from common substances like sunscreen and hairspray, which can craze and crack polycarbonate lenses.
Product record
- Title
- Monogram Massive Square Sunglasses
- Brand
- Saint Laurent
- Price
- 600 CAD
- Availability
- In stock
Buying Guide
1 comparison · 8 sourcesUses
Sun protection on bright days
These Saint Laurent square sunglasses carry a Level 3 UV protection rating, which the retailer describes as perfect for sunny days. They come with a designer case and a small cleaning cloth for keeping the lenses clear between wears.[1]
A rock-inspired statement accessory
Per the retailer, these Saint Laurent sunglasses pair a rock-inspired yet refined square frame with a timeless, pared-back look, finished with the finely inscribed YSL signature on the temples. They work as a style piece to complete an outfit rather than just sun protection.[1]
Product comparison
Compared within this brand.
| Monogram Massive Square Sunglasses: Choose this if you want a bold, rock-inspired square frame in glossy black acetate with slightly upswept corners, green-gray nylon lenses rated Level 3 for UV protection on sunny days. It carries Saint Laurent's finely inscribed YSL signature and a small gold monogram near the hinge, comes in one size with a 57 mm eye width, 17 mm bridge, and 145 mm temples, and includes a designer case and cleaning cloth; it is made in Japan.[1,2] | Square Sunglasses: Choose this if you want a minimalist square acetate frame with subtle Saint Laurent branding — the signature on the temples plus a small gold decorative hinge detail — and nylon lenses that provide complete UVA and UVB protection. Made in Italy, it comes in one size (eye width 54 mm, bridge 19 mm, temple 145 mm) in the listed Taupe colorway and includes a designer case and cleaning cloth. Keep in mind one commenter's view that Saint Laurent is best for buyers prioritizing branding and design rather than frame quality.[3,4,5] | Rounded Cat-Eye Sunglasses: Choose this if you want a glossy black, vintage-inspired cat-eye frame with upswept corners, a light acetate build, and gray gradient lenses, with a subtle SAINT LAURENT wordmark on the temple. It comes in one size (roughly 57 mm eye width with a 15 mm bridge and 145 mm temples) and includes a rigid designer case. Note the lenses have a Level 2 UV protection rating, which the retailer describes as best suited to cloudy or partly sunny days rather than bright sun.[6,7,8] |
Image Analysis
1 images- 01
Product
Glossy black full-rim square sunglasses with slightly upswept outer corners, green-gray tinted lenses, and a small gold monogram on the right temple; shown at a three-quarter front-right angle.
- Frame shapeThick full-rim square frame with slightly upswept outer corners creating a mild cat-eye effect; bridge is integrated and continuous with the front frame.
1 region
x 0.05 · y 0.28 · w 0.60 · h 0.45 (high) - Frame finish and material appearanceHigh-gloss smooth surface on the frame and temples consistent with polished acetate or similar glossy plastic.
1 region
x 0.05 · y 0.28 · w 0.85 · h 0.50 (high) - LensesSingle-piece green-gray tinted lenses with uniform tint; lenses sit flush with inner rim and have a slight reflective sheen.
2 regions
x 0.14 · y 0.34 · w 0.36 · h 0.36 (high); x 0.40 · y 0.34 · w 0.36 · h 0.36 (high) - Right temple detailRight temple visible at a three-quarter angle with a small metallic gold monogram emblem applied near the hinge on the outer face.
1 region
x 0.62 · y 0.39 · w 0.20 · h 0.17 (high) - Hinges and temple profileTemples are straight with a slight taper toward the tips; hinge area forms a subtle rectangular block where the temple meets the front frame.
1 region
x 0.55 · y 0.36 · w 0.30 · h 0.22 (high) - Nose areaIntegrated molded nose bridge with slight contouring visible where lenses meet at the center.
1 region
x 0.33 · y 0.44 · w 0.12 · h 0.10 (medium)
Other
Three-quarter front-right studio shot on a light neutral background with soft shadow beneath the sunglasses; even diffuse lighting and a visible soft shadow to the right and below the product.
- Shot compositionSunglasses photographed at a low three-quarter front-right angle, showing front and right temple with the left temple receding into the background.
- Background and surfaceEven light gray to off-white seamless background and surface with a soft diffuse shadow cast by the sunglasses to the lower right.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Lighting and reflectionsSoft, even studio lighting creating subtle highlights on the glossy frame edges and faint reflections on the lens surfaces.
Colors
gloss black· framegreen-gray tint· lenses#717E7Emetallic gold· right temple monogram- Frame shapeThick full-rim square frame with slightly upswept outer corners creating a mild cat-eye effect; bridge is integrated and continuous with the front frame.