Woman wearing black 2nu Halo sunglasses with deep-blue lenses in high mountain light for the Cycling and High Mountain Trekking sunglasses guide.

Your activity match

High-speed roads to exposed climbs—keep wind stability, hard glare, and route checks together.

Cycling speed and wind meet rock, snow, and long high-route exposure. Start with stable coverage and UV400, then compare Hexachroma for GPS, maps, and terrain detail with TVO Pro for strong polarized glare control.

Cycling
High Mountain Trekking

Shop your strongest matches

The four issues that matter most across your two activities

We selected two high-priority issues from each activity. Open any card to see how 2nu addresses it.

Wind and movement shift the frame

Speed, shoulder checks and rough surfaces can make a loose frame move. Over-tightening it can create pressure instead of stable support.

How 2nu solves it

Choose stability for the exact frame

Use the product callout’s frame-coverage and head-fit information to compare the complete frame. FlexFoam™ models can be adjusted by hand, then worn for about five minutes while FlexLock™ spreads support around the head. Venti Air prioritises an ultra-light open sport-frame fit.

Exposed snow and rock create hard glare

Above the treeline, direct sun and reflected light can remain intense for long sections with little natural shade.

How 2nu solves it

Start with ALPINE-rated glare control

Every 2nu sunglass lens provides UV400 protection. For sustained exposed glare, start with the deeper blue- or gold-mirror configurations that rank strongly on the ALPINE axis, then choose TVO Pro or Hexachroma by detail and screen needs.

Bright tarmac turns into deep shade

An open road can move quickly into tree cover, underpasses or cloud. A very dark lens can hide road texture when light drops.

How 2nu solves it

Balance road glare with shadow detail

Choose for the light pattern of your usual route, not simply the darkest tint. TVO Pro prioritizes polarized glare control; Hexachroma adds flagship outdoor detail when changing surfaces and light need to remain easier to read.

Rock, snow and shadow detail changes quickly

Terrain can move from bright snow or pale rock into deep shadow, making surface texture and route cues harder to separate.

How 2nu solves it

Keep terrain detail in the decision

TVO Pro focuses on strong polarized glare control. Hexachroma is the flagship option when you also want higher outdoor detail and easier separation across exposed and shaded terrain.

Checking the strongest available matches.

How we choose

Balanced for Cycling + High Mountain Trekking

We compare brightness and changing light, colour and contrast, reflected glare and screen use, and frame performance across both activities—then rank the strongest overall balance.

Cycling

Stable coverage with contrast that adapts to changing light.

High Mountain Trekking

Stronger light control and coverage for exposed high-altitude conditions.

Choose by lens family

Fancy™ Sunglasses
FFMBKOE-TP

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per
Lens
Fancy: 53-20-138; total width 142 mm.
Zealot: 60-18-138; total width 145 mm.
Size - Normal is the standard 2nu fit class for most everyday head shapes. Fancy gives a classic standard-frame feel, while Zealot gives more front coverage but still sits in the normal fit direction.
Both use flexible frame structure to stay comfortable if your face is slightly wider than average.
UV400 protection blocks UVA and UVB rays up to 400 nm, the range most relevant to daily outdoor sun exposure. It is the baseline protection in 2nu sunglasses, so your eyes are protected while the lens technology handles glare, contrast, and comfort.

Polarized lenses reduce strong reflected glare from water, glass, wet roads, and other bright surfaces. They are useful outdoors, but typical polarized lenses can sometimes make phone, watch, dashboard, or navigation screens black out or look uneven.

Hexachroma™ is 2nu’s outdoor light-management lens technology. Typical polarized lenses mainly reduce glare from one direction. Hexachroma™ is tuned to manage more complex outdoor reflections from seawater, wet roads, metal grates, glass, and concrete, reducing harsh glare while keeping road texture, water layers, shadow detail, and colour contrast easier to read. The goal is not to make everything darker; it is to keep vision clearer, steadier, and more natural outdoors.

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.

FlexFoam™ is 2nu’s flexible frame construction for comfort and stability. It gives the frame a more forgiving feel against the head and face, helping reduce pressure during long wear while keeping the sunglasses secure for outdoor movement.

FLOAT MAX is built for water use. The frame is designed to stay afloat if dropped in water, helping reduce the chance of losing your sunglasses during paddling, boating, beach training, fishing, or water sports.

Prescription lenses are made to order from your vision details. Choose the frame and lens option first, then enter your prescription at checkout or send it later by WhatsApp or email. Production starts after the details are confirmed.
Halo™ Sunglasses
HFMBKOE-TP

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per
Lens
Halo: 56-18-138; total width 142 mm.
Normal - Smaller is a compact and secure fit for standard to narrower faces. It is useful if regular sunglasses often feel slightly loose, or if you prefer a closer fit for movement.
The FlexFoam™ frame helps the fit feel secure without feeling hard or sharply compressed.
UV400 protection blocks UVA and UVB rays up to 400 nm, the range most relevant to daily outdoor sun exposure. It is the baseline protection in 2nu sunglasses, so your eyes are protected while the lens technology handles glare, contrast, and comfort.

Polarized lenses reduce strong reflected glare from water, glass, wet roads, and other bright surfaces. They are useful outdoors, but typical polarized lenses can sometimes make phone, watch, dashboard, or navigation screens black out or look uneven.

Hexachroma™ is 2nu’s outdoor light-management lens technology. Typical polarized lenses mainly reduce glare from one direction. Hexachroma™ is tuned to manage more complex outdoor reflections from seawater, wet roads, metal grates, glass, and concrete, reducing harsh glare while keeping road texture, water layers, shadow detail, and colour contrast easier to read. The goal is not to make everything darker; it is to keep vision clearer, steadier, and more natural outdoors.

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.

FlexFoam™ is 2nu’s flexible frame construction for comfort and stability. It gives the frame a more forgiving feel against the head and face, helping reduce pressure during long wear while keeping the sunglasses secure for outdoor movement.

FLOAT MAX is built for water use. The frame is designed to stay afloat if dropped in water, helping reduce the chance of losing your sunglasses during paddling, boating, beach training, fishing, or water sports.

Prescription lenses are made to order from your vision details. Choose the frame and lens option first, then enter your prescription at checkout or send it later by WhatsApp or email. Production starts after the details are confirmed.
Cogs™ Sunglasses
CFMBKOE-TP

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per
Lens
Cogs: 55-19-138; total width 145 mm.
Normal - Larger is a relaxed fit for standard to slightly wider faces. Choose it if regular sunglasses often press at the temples, feel too narrow, or sit too close to your eyes.
Cogs gives a little more room while the soft frame material helps reduce pressure marks during long wear.
UV400 protection blocks UVA and UVB rays up to 400 nm, the range most relevant to daily outdoor sun exposure. It is the baseline protection in 2nu sunglasses, so your eyes are protected while the lens technology handles glare, contrast, and comfort.

Polarized lenses reduce strong reflected glare from water, glass, wet roads, and other bright surfaces. They are useful outdoors, but typical polarized lenses can sometimes make phone, watch, dashboard, or navigation screens black out or look uneven.

Hexachroma™ is 2nu’s outdoor light-management lens technology. Typical polarized lenses mainly reduce glare from one direction. Hexachroma™ is tuned to manage more complex outdoor reflections from seawater, wet roads, metal grates, glass, and concrete, reducing harsh glare while keeping road texture, water layers, shadow detail, and colour contrast easier to read. The goal is not to make everything darker; it is to keep vision clearer, steadier, and more natural outdoors.

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.

FlexFoam™ is 2nu’s flexible frame construction for comfort and stability. It gives the frame a more forgiving feel against the head and face, helping reduce pressure during long wear while keeping the sunglasses secure for outdoor movement.

FLOAT MAX is built for water use. The frame is designed to stay afloat if dropped in water, helping reduce the chance of losing your sunglasses during paddling, boating, beach training, fishing, or water sports.

Prescription lenses are made to order from your vision details. Choose the frame and lens option first, then enter your prescription at checkout or send it later by WhatsApp or email. Production starts after the details are confirmed.
Ovo™ Sunglasses
OFMBKOE-TP

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per

Regular price ¥868.00 CNY

Regular price Sale price ¥868.00 CNY
Unit price per
Lens
Ovo: 57-19-138; total width 149 mm.
Size - Larger / Wide Fit is for wider faces or larger head circumference. It is the safest direction if regular frames often feel tight, pinch at the temples, or create headaches after longer wear.
Ovo gives 2nu’s widest frame structure while the flexible material helps the frame sit more naturally.
UV400 protection blocks UVA and UVB rays up to 400 nm, the range most relevant to daily outdoor sun exposure. It is the baseline protection in 2nu sunglasses, so your eyes are protected while the lens technology handles glare, contrast, and comfort.

Polarized lenses reduce strong reflected glare from water, glass, wet roads, and other bright surfaces. They are useful outdoors, but typical polarized lenses can sometimes make phone, watch, dashboard, or navigation screens black out or look uneven.

Hexachroma™ is 2nu’s outdoor light-management lens technology. Typical polarized lenses mainly reduce glare from one direction. Hexachroma™ is tuned to manage more complex outdoor reflections from seawater, wet roads, metal grates, glass, and concrete, reducing harsh glare while keeping road texture, water layers, shadow detail, and colour contrast easier to read. The goal is not to make everything darker; it is to keep vision clearer, steadier, and more natural outdoors.

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.

FlexFoam™ is 2nu’s flexible frame construction for comfort and stability. It gives the frame a more forgiving feel against the head and face, helping reduce pressure during long wear while keeping the sunglasses secure for outdoor movement.

FLOAT MAX is built for water use. The frame is designed to stay afloat if dropped in water, helping reduce the chance of losing your sunglasses during paddling, boating, beach training, fishing, or water sports.

Prescription lenses are made to order from your vision details. Choose the frame and lens option first, then enter your prescription at checkout or send it later by WhatsApp or email. Production starts after the details are confirmed.
Zealot™ Sunglasses
ZFMBKOE-HEX

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per
Lens
Fancy: 53-20-138; total width 142 mm.
Zealot: 60-18-138; total width 145 mm.
Size - Normal is the standard 2nu fit class for most everyday head shapes. Fancy gives a classic standard-frame feel, while Zealot gives more front coverage but still sits in the normal fit direction.
Both use flexible frame structure to stay comfortable if your face is slightly wider than average.
UV400 protection blocks UVA and UVB rays up to 400 nm, the range most relevant to daily outdoor sun exposure. It is the baseline protection in 2nu sunglasses, so your eyes are protected while the lens technology handles glare, contrast, and comfort.

Polarized lenses reduce strong reflected glare from water, glass, wet roads, and other bright surfaces. They are useful outdoors, but typical polarized lenses can sometimes make phone, watch, dashboard, or navigation screens black out or look uneven.

Hexachroma™ is 2nu’s outdoor light-management lens technology. Typical polarized lenses mainly reduce glare from one direction. Hexachroma™ is tuned to manage more complex outdoor reflections from seawater, wet roads, metal grates, glass, and concrete, reducing harsh glare while keeping road texture, water layers, shadow detail, and colour contrast easier to read. The goal is not to make everything darker; it is to keep vision clearer, steadier, and more natural outdoors.

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.

FlexFoam™ is 2nu’s flexible frame construction for comfort and stability. It gives the frame a more forgiving feel against the head and face, helping reduce pressure during long wear while keeping the sunglasses secure for outdoor movement.

FLOAT MAX is built for water use. The frame is designed to stay afloat if dropped in water, helping reduce the chance of losing your sunglasses during paddling, boating, beach training, fishing, or water sports.

Prescription lenses are made to order from your vision details. Choose the frame and lens option first, then enter your prescription at checkout or send it later by WhatsApp or email. Production starts after the details are confirmed.
Venti Air™ - Sunglasses
VVLEANNE-TP

Regular price ¥1,131.00 CNY

Regular price Sale price ¥1,131.00 CNY
Unit price per
Lens
Venti Air: 148-138; total width 148 mm.
Size - Flexible is the most adaptable fit direction. Its open, minimalist sport-frame structure allows more fit tolerance across head sizes, making it a safer choice if you are unsure about sizing or buying as a gift.
The frame adjusts tension through its flexible structure for a secure, low-pressure grip.
UV400 protection blocks UVA and UVB rays up to 400 nm, the range most relevant to daily outdoor sun exposure. It is the baseline protection in 2nu sunglasses, so your eyes are protected while the lens technology handles glare, contrast, and comfort.

Polarized lenses reduce strong reflected glare from water, glass, wet roads, and other bright surfaces. They are useful outdoors, but typical polarized lenses can sometimes make phone, watch, dashboard, or navigation screens black out or look uneven.

Hexachroma™ is 2nu’s outdoor light-management lens technology. Typical polarized lenses mainly reduce glare from one direction. Hexachroma™ is tuned to manage more complex outdoor reflections from seawater, wet roads, metal grates, glass, and concrete, reducing harsh glare while keeping road texture, water layers, shadow detail, and colour contrast easier to read. The goal is not to make everything darker; it is to keep vision clearer, steadier, and more natural outdoors.

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.

FlexFoam™ is 2nu’s flexible frame construction for comfort and stability. It gives the frame a more forgiving feel against the head and face, helping reduce pressure during long wear while keeping the sunglasses secure for outdoor movement.

FLOAT MAX is built for water use. The frame is designed to stay afloat if dropped in water, helping reduce the chance of losing your sunglasses during paddling, boating, beach training, fishing, or water sports.

Prescription lenses are made to order from your vision details. Choose the frame and lens option first, then enter your prescription at checkout or send it later by WhatsApp or email. Production starts after the details are confirmed.

Questions before you choose

Use these answers to compare the lens, frame and conditions that matter across your selected activities.

01Should I choose Hexachroma or TVO Pro for cycling?

Choose TVO Pro when strong polarized control of road, vehicle and wet-surface glare is the main priority. Choose flagship Hexachroma when you also want higher outdoor detail and easier checks of a cycling computer, GPS, phone or watch. Both provide UV400 protection.

02Why start with deeper blue- or gold-mirror configurations for ALPINE conditions?

Above the treeline, direct sun and reflected light can remain intense for long sections with little shade. Deeper blue- or gold-mirror configurations are the starting point for sustained exposed glare; compare the ALPINE radar and the exact lens option rather than choosing by colour alone.

03How dark should cycling sunglasses be when the road moves between sun and shade?

Choose balanced light control for routes that move between open sun, tree cover, tunnels and cloud. A deeper configuration suits sustained exposed glare, but it should not remove the road texture and obstacle detail you need when the route turns darker.

04Can polarized lenses darken map, GPS or watch screens at altitude?

They can. Screen behaviour varies by display and viewing angle. Hexachroma helps reduce common polarized screen black-out while retaining glare control, but the result cannot be identical on every device. Check essential route tools before a long trek.

High-speed roads to exposed climbs—keep wind stability, hard glare, and route checks together.

The four issues that matter most across your two activities

Wind and movement shift the frame

Choose stability for the exact frame

Exposed snow and rock create hard glare

Start with ALPINE-rated glare control

Bright tarmac turns into deep shade

Balance road glare with shadow detail

Rock, snow and shadow detail changes quickly

Keep terrain detail in the decision

No strong match is available right now.

Balanced for Cycling + High Mountain Trekking

Cycling

High Mountain Trekking

Choose by lens family

Fancy™ Sunglasses

Halo™ Sunglasses

Cogs™ Sunglasses

Ovo™ Sunglasses

Zealot™ Sunglasses

Venti Air™ - Sunglasses

Questions before you choose

We don’t start with sunglasses. We start with how you move.

How 2nu helps you choose

Choose one activity

Choose two or three activities

What we consider

What you will see

Enter your prescription

Your cart

Compare your shortlist

No glasses saved yet

Your comparison is full