Long seawater exposure
Lab-tested with 48 hours of seawater immersion, with no lens damage after extended seawater exposure.
Metonic
Outdoor lens surface coating
48-hour seawater immersion tested
48-hour protection against seawater, sweat and oil for mirrored lenses.
Metonic Coating forms a protective layer over the mirrored lens finish. It withstands seawater, sweat and oil exposure for 48 hours, helping reduce coating peel-off and delamination and improve durability during repeated outdoor use.
48-hour seawater test
Oil releases easier
Longer lens durability
Why it matters
Mirrored lens coatings need protection from seawater, sweat and oil to help prevent peeling and delamination.
Seawater, sweat and oil can attack mirrored lens coatings and lead to peel-off or delamination. Metonic Coating adds a protective layer that withstands these exposures for 48 hours, improving durability for coastal days, watersports, running and repeated outdoor use.
Its surface helps droplets, salt and oil release more easily, reducing stubborn residue on the lens and helping clarity and coating performance last longer in everyday use.
What it helps with
Core strength: 48-hour resistance to seawater, sweat and oil, helping reduce mirrored-coating peel-off and delamination.
Oil releases easier
Skin oil, sweat and fingerprints are less likely to cling stubbornly to the lens, so regular wipe-downs feel smoother.
Droplets and salt clear faster
Droplets and salt residue clear from the surface more easily, reducing how long outdoor build-up sits on the lens.
Longer lens durability
With less stubborn residue and less repeated rubbing during cleaning, the coating and optical clarity can stay in better condition for longer.
Best-practice care
Pair it with simple care for longer-lasting lens performance.
Metonic already gives the lens strong surface protection against seawater, salt and oil. After outdoor use, these three simple steps help reduce lingering grit and oil so the lens stays clearer for longer.
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Rinse first
Rinse the sunglasses under tap water to remove dust, grit and surface debris.
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Dry with microfiber
Use a microfiber cloth or the pouch provided to dry and clean the lenses and frame. Avoid air drying, as water marks may remain.
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Use isopropyl alcohol for oil
For excessive oil, apply isopropyl alcohol at 75% or below to the microfiber cloth, then wipe gently. Avoid soap or dish soap to help keep the coating stable for longer.
Where it fits
Useful in the places 2nu sunglasses are actually worn.
Sweat, skin oil and quick clean-downs after effort.
Sea air, spray and salt around boats, boards and coastlines.
Humid trails, dust and long hours outside.
Commuting, driving, handling marks and regular lens care.
FAQ
Practical questions about Metonic coating.
What is Metonic coating?
Metonic Coating is a protective layer over 2nu mirrored lens finishes. It withstands seawater, sweat and oil exposure for 48 hours, helping reduce coating peel-off and delamination and extend durability.
How do I make Metonic lenses last longer?
Metonic already gives the lens long seawater durability and oil-release surface protection. To help performance last longer, rinse away salt, dust and grit after outdoor use, then dry with a microfiber cloth or the pouch provided.
Does Metonic help around seawater?
Yes. Metonic Coating withstands seawater, sweat and oil exposure for 48 hours. Its protective layer helps reduce mirrored-coating peel-off and delamination during repeated outdoor use.
How should I clean oil from the lens?
Rinse away dust and grit first. For heavier oil, apply isopropyl alcohol at 75% or below to a microfiber cloth and wipe gently. Avoid soap or dish soap to help keep the coating stable for longer.
Which 2nu lenses use Metonic?
All 2nu sunglass lenses include Metonic Coating, providing a protective layer that withstands seawater, sweat and oil exposure for 48 hours.
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