Nayah Square Sunglasses

Meller's Nayah Square Sunglasses combine Barcelona-inspired square frames with TAC polarized lenses that deliver over 99% glare extinction without color cast, alongside factory-applied anti-scratch and superhydrophobic coatings that repel water, dust, and oils to keep lenses clear. The lightweight TAC lenses (one-third the weight of glass) reduce strain, and the bio-acetate frame is heat-adjustable for a custom fit while remaining nickel-free and hypoallergenic. A category 2 tint (18–43% VLT) suits both bright and shaded conditions, though the frame width varies by color variant (138 mm black vs. 149 mm maroon brown).

Polarization

PVA/TAC sandwich construction achieves over 99% glare extinction without color cast.

Why this is supported

The polarized lenses use a PVA polarizing film laminated between two TAC layers, achieving over 99% glare extinction without the color cast common to cheaper extruded polyester polarizers.

the Nayah a uniformly sharp, color-accurate view across the entire lensTAC polarized lens technology and everyday use — triacetate_cellulose_tac_substrate

The product listing also states:

They feature TAC polarized lenses with anti-scratch and superhydrophobic coatingAre the lenses polarized?

Coatings

Factory-applied anti-scratch and superhydrophobic coatings protect the lens.

Why this is supported

Because bare TAC is soft, a factory-applied anti-scratch coating is essential to prevent marring and maintain optical quality.

Because bare TAC is relatively soft and easily marred, the factory-applied anti-scratch coating is essential to preserving long-term optical qualityTAC polarized lens technology and everyday use — anti_scratch_hardening_over_tac

This coating is applied to the lens surface, not integrated into the material, as confirmed by the Q&A:

The scratch-resistant treatment is an anti-scratch coating applied to the lens surface, not an integrated property of the lens material.Is the scratch-resistant treatment a coating or integrated into the lens material?

The lens also features a superhydrophobic topcoat that beads water:

The superhydrophobic topcoat creates a microscopic texture that forces water into tight beads that roll off with minimal tilt, carrying away dust, oils, and salt sprayTAC polarized lens technology and everyday use — superhydrophobic_lens_coating

Tint

Category 2 tint (18–43% VLT) suits both bright and shaded conditions.

Why this is supported

The black variant's category 2 tint transmits 18–43% of visible light, making it versatile for changing light conditions.

The Black variant's category 2 tint sits in the sweet spot for changing light — dark enough to cut glare on bright afternoons yet translucent enough that you can keep them on when stepping into a café or walking through forest shade, avoiding the disorienting 'tunnel vision' of darker category 3 lenses.TAC polarized lens technology and everyday use — category_2_daylight_versatility

The Q&A confirms the lens category:

The Nayah Square Sunglasses have a lens category of 2 (medium dark filter), transmitting 18–43% of visible light.What is the lens category (e.g., 1-4) and visible light transmission percentage?

Optical clarity

TAC polarized lenses achieve over 99% glare extinction and zero distortion

Why this is supported

The lenses achieve

over 99% glare extinctionTAC polarized lens technology and everyday use — sandwich_construction_polarization

from their

TAC polarized lensesAre the lenses polarized?

, and the substrate

eliminates the internal stress birefringence that can introduce distortionTAC polarized lens technology and everyday use — triacetate_cellulose_tac_substrate

Scratch resistance

Anti-scratch coating protects soft TAC lenses from everyday abrasion, preserving clarity.

Why this is supported

The product's scratch-resistant treatment is an applied coating. Bare TAC is soft, so the coating is critical:

Because bare TAC is relatively soft and easily marred, the factory-applied anti-scratch coating is essential to preserving long-term optical qualityTAC polarized lens technology and everyday use — anti_scratch_hardening_over_tac

. The coating creates a hardened surface that withstands everyday abrasion:

it creates a hardened surface that withstands everyday abrasion from wiping, pocket-stashing, and occasional drops onto pavement.TAC polarized lens technology and everyday use — anti_scratch_hardening_over_tac

. A superhydrophobic topcoat also reduces cleaning frequency, indirectly protecting the coating:

superhydrophobic topcoat creates a microscopic texture that forces water into tight beads that roll off with minimal tilt, carrying away dust, oils, and salt sprayTAC polarized lens technology and everyday use — superhydrophobic_lens_coating

. These layers preserve optical clarity despite TAC's softness.

Water beading

Water beads and rolls off, carrying dust and oil, so lenses stay clear with minimal cleaning.

Why this is supported

The Nayah's superhydrophobic coating

forces water into tight beads that roll off with minimal tilt, carrying away dust, oils, and salt sprayTAC polarized lens technology and everyday use — superhydrophobic_lens_coating

— so even after a drizzle or sea spray,

a quick head shake or single wipe with the included cloth restores clarityTAC polarized lens technology and everyday use — superhydrophobic_lens_coating

Coating layering

The superhydrophobic coating is a separate topcoat applied over the anti-scratch layer.

Why this is supported

The lens has a

The superhydrophobic topcoatTAC polarized lens technology and everyday use — superhydrophobic_lens_coating

applied over the TAC lens and a separate

factory-applied anti-scratch coatingTAC polarized lens technology and everyday use — anti_scratch_hardening_over_tac

for dual-layer protection.

Optics

TAC lenses eliminate optical distortion and block 99% of horizontal glare.

Why this is supported

The TAC lens material is cast into optically perfect sheets, which

eliminates the internal stress birefringence that can introduce distortion, giving the Nayah a uniformly sharp, color-accurate view across the entire lens.TAC polarized lens technology and everyday use — triacetate_cellulose_tac_substrate

Additionally, the polarizing film

horizontal reflective glare from water, asphalt, and car hoods is virtually eliminated without the faint color cast that cheaper, extruded-polarized polyester lenses sometimes impart.TAC polarized lens technology and everyday use — sandwich_construction_polarization

This ensures both clarity and color fidelity.

Lens coating

Anti-scratch and superhydrophobic coatings protect lenses from abrasion and repel water, dust, and oils.

Why this is supported

The factory applies two critical coatings: first,

the factory-applied anti-scratch coating is essential to preserving long-term optical quality; it creates a hardened surface that withstands everyday abrasion from wiping, pocket-stashing, and occasional drops onto pavement.TAC polarized lens technology and everyday use — anti_scratch_hardening_over_tac

Second, a superhydrophobic layer

forces water into tight beads that roll off with minimal tilt, carrying away dust, oils, and salt sprayTAC polarized lens technology and everyday use — superhydrophobic_lens_coating

These coatings together enhance durability and keep the lens surface clear.

Fit

Lightweight TAC lenses (1/3 weight of glass) and heat-adjustable frame provide comfort and stability.

Why this is supported

The TAC lenses are lightweight:

TAC lenses weigh roughly one-third of comparable mineral glass, so the Nayah’s full-frame square silhouette stays planted on the nose without clamping forceTAC polarized lens technology and everyday use — lightweight_tac_vs_glass

Additionally, the frame material

Bio-acetate can be gently heated and precisely reshaped, a property it shares with all cellulose acetate — allowing an optician to tweak the temple arms or bridge for a custom, secure fit that eliminates slippage without risking cracks.Why biosourced acetate matters for frames — optician_adjustable_fit

This combination ensures comfort and proper optical alignment.

Weight

TAC lenses weigh roughly one-third of glass, reducing clamping force.

Why this is supported

Research confirms that TAC lenses are significantly lighter than glass, reducing pressure on the nose and temples.

TAC lenses weigh roughly one-third of comparable mineral glass, so the Nayah’s full-frame square silhouette stays planted on the nose without clamping force — a benefit you'll notice after hours of touring or beach reading.TAC polarized lens technology and everyday use — lightweight_tac_vs_glass

This weight advantage directly contributes to long-wear comfort without the need for high clamping force.

Optical quality

TAC lenses eliminate distortion and cut 99% of glare without color cast.

Why this is supported

The TAC lens manufacturing process ensures excellent optical performance.

TAC is the dominant polarized-lens material because its manufacturing process — casting into optically perfect sheets rather than injection molding — eliminates the internal stress birefringence that can introduce distortion, giving the Nayah a uniformly sharp, color-accurate view across the entire lens.TAC polarized lens technology and everyday use — triacetate_cellulose_tac_substrate

Additionally, the polarization is highly effective:

A polyvinyl alcohol (PVA) polarizing film is laminated between two TAC layers, a method that routinely achieves over 99% glare extinction; horizontal reflective glare from water, asphalt, and car hoods is virtually eliminated without the faint color cast that cheaper, extruded-polarized polyester lenses sometimes impart.TAC polarized lens technology and everyday use — sandwich_construction_polarization

Together, these factors guarantee a clear, glare-free view.

Adjustability

Bio-acetate frame can be heated and reshaped by an optician for a custom fit.

Why this is supported

can be gently heated and precisely reshaped, a property it shares with all cellulose acetate — allowing an optician to tweak the temple arms or bridge for a custom, secure fit that eliminates slippage without risking cracks.Why biosourced acetate matters for frames — optician_adjustable_fit

the frame retains the signature high-polish lustre, warmth, and ability to be custom-fitted by heatingWhy biosourced acetate matters for frames — 45_castor_oil_plasticizer

Hypoallergenic

Acetate frame with no metal skin contact is nickel-free and hypoallergenic.

Why this is supported

Catalog verified that the frame body is entirely acetate with no metal skin contact, as documented in deep research on biosourced acetate for eyewear:

Since the frame body is entirely acetate — no metal touches the skin — the Nayah is inherently nickel-free and hypoallergenic, making it a safe choice for anyone with metal sensitivities or contact dermatitis, even in hot, sweaty conditions.Why biosourced acetate matters for frames — nickel_free_hypoallergenic

This confirms the Nayah is inherently nickel-free and hypoallergenic across all color variants and with the TAC polarized lenses, making the entire sunglasses metal-free.

The 45% bio-based content in the Nayah's frame comes from castor plant seed oil used as the plasticizer, not the cellulose itself.

The 45% bio-based content comes from castor plant seed oil used as the plasticizer, not the cellulose itselfWhy biosourced acetate matters for frames — 45_castor_oil_plasticizer

This means the frame retains the signature high-polish lustre and warmth of traditional acetate. Additionally, it can be heated and reshaped by an optician for a custom fit, and being an all-acetate frame with no metal components, it is inherently nickel-free and hypoallergenic.

the Nayah is inherently nickel-free and hypoallergenic, making it a safe choice for anyone with metal sensitivities or contact dermatitis, even in hot, sweaty conditions.Why biosourced acetate matters for frames — nickel_free_hypoallergenic

Bio-acetate can be gently heated and precisely reshaped, a property it shares with all cellulose acetate — allowing an optician to tweak the temple arms or bridge for a custom, secure fit that eliminates slippage without risking cracks.Why biosourced acetate matters for frames — optician_adjustable_fit

This combination offers a sustainable, adjustable, and hypoallergenic frame that outperforms injection-molded petroleum alternatives.

The frame uses 45% bio-based acetate, which

retains the signature high-polish lustre, warmth, and ability to be custom-fitted by heating — advantages that pure injection-molded petroleum frames can't matchWhy biosourced acetate matters for frames — 45_castor_oil_plasticizer

. The material is

allowing an optician to tweak the temple arms or bridge for a custom, secure fit that eliminates slippage without risking cracksWhy biosourced acetate matters for frames — optician_adjustable_fit

. And because it contains no metal, the frame is

inherently nickel-free and hypoallergenic, making it a safe choice for anyone with metal sensitivities or contact dermatitisWhy biosourced acetate matters for frames — nickel_free_hypoallergenic

.

Width variation

Black variant is 138 mm wide; Maroon Brown is 149 mm.

Why this is supported

Meller's Q&A confirms that

The total frame width of the Nayah Square Sunglasses in Black is approximately 138 mm. Note that measurements may vary slightly between colorways — for instance, the Maroon Brown version has a width of 149 mm.What is the total frame width?

, providing specific widths for Black and Maroon Brown and explicitly stating that measurements vary between colorways.

Design heritage

Barcelona-inspired square frames with category 2 tint and superhydrophobic coatings for urban–beach versatility.

Why this is supported

The Nayah's square silhouette is inspired by Barcelona's modernist architecture. Meller's founding story notes that the city's character

informs the brand's lean toward geometric, clean-lined frames and a Mediterranean easeMeller as a design-forward eyewear brand — barcelona_design_heritage_2016

. For seamless urban–beach transitions, the lens uses a category 2 tint that strikes a

sweet spot for changing light — dark enough to cut glare on bright afternoons yet translucent enough that you can keep them on when stepping into a café or walking through forest shade, avoiding the disorienting 'tunnel vision' of darker category 3 lensesTAC polarized lens technology and everyday use — category_2_daylight_versatility

. The lens also benefits from a superhydrophobic coating that

forces water into tight beads that roll off with minimal tilt, carrying away dust, oils, and salt sprayTAC polarized lens technology and everyday use — superhydrophobic_lens_coating

and an anti-scratch layer that

creates a hardened surface that withstands everyday abrasion from wiping, pocket-stashing, and occasional drops onto pavementTAC polarized lens technology and everyday use — anti_scratch_hardening_over_tac

.

Lens quality

TAC lenses weigh 1/3 of glass and provide over 99% glare extinction without distortion.

Why this is supported

The TAC (triacetate cellulose) lenses are notably light: they

weigh roughly one-third of comparable mineral glass, so the Nayah's full-frame square silhouette stays planted on the nose without clamping forceTAC polarized lens technology and everyday use — lightweight_tac_vs_glass

. The sandwich-construction polarization also

eliminates the internal stress birefringence that can introduce distortion, giving the Nayah a uniformly sharp, color-accurate view across the entire lensTAC polarized lens technology and everyday use — triacetate_cellulose_tac_substrate

.