Flow Day
For screens, 9 to 6.
A soft yellow lens that takes the harsh edge off screen light. Everything stays bright and true, and the tint is so light nobody can tell you're wearing it. You just notice your eyes stop fighting the screen.
☼ Flow Day
☾ Flow EveningBuy 1 Get 1 Free · The Flow Set
Focus by day.
Recover by night.
Lab-tested by an independent lab · ANSI and EN ISO certified · 5.0 ★ from 22 verified reviews
One frame, two lenses. Day takes the harsh edge off your screens so your eyes stop fighting them. Evening tells your brain it's night, so you can actually wind down. Get both for $92.
Get Both for $92
Free U.S. shipping · 14 nights to feel the difference, or send them back
*Second pair free, applied automatically at checkout. No code.
- Eyes that stop fighting the screen
- Colors that stay true
- Evenings that feel like evenings
- Keep your shows, lose the buzz
- 100% UV blocked
- No code needed
Sound familiar?
Your day runs on the wrong light.
9:00 AMInbox, Slack, three tabs. You feel sharp.
3:00 PMThe squint starts. A dull ache behind your eyes, and the screen feels too bright to look at.
6:30 PMYou're not tired from the work. You're tired from staring at the work.
11:40 PMLights off, phone on. Your body is exhausted, but your brain acts like it's noon.
7:00 AMGroggy. Coffee. Repeat.
It isn't a willpower problem. It's a light problem. Screens all day, bright light long after sunset, and your eyes and your body clock pay for both.
The science, plainly
Your brain reads light like a clock.
A small clock in your brain uses light to decide day or night. By day, harsh screen blue makes your eyes work harder than they should. After dark, that same light tells your brain the sun is still up, so it holds off on sleep. The answer isn't fewer screens. It's the right light at the right hour.
☼ By day
too much harsh blue = strain, squint, the 3pm fog.
☾ By night
any blue = "it's still daytime", so you stay wired.
The Flow Set
One lens for the desk. One for the couch.
Flow Evening
For the 1 to 3 hours before bed.
A warm amber lens that blocks most of the blue your brain reads as daytime. Keep your show, your book, your phone. Lose the wired feeling, and let the night feel like night.
Same Flow frame. Same fit. Tortoise or black. Get both for $92.
Get Both for $92Numbers, translated
What 54.5% feels like at 3pm.
Every lens is measured by an independent lab. Here's what those numbers mean for your day.
Clear lens
Flow Day
Simulated tint, for illustration.
☼ Day lens
54.5%
of harsh screen blue filtered.
That's more than half of the light that makes you squint, gone, so your 3pm feels more like your 10am.
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90% of light still gets through. That means no dim, orange world. Colors, skin tones and design work look like themselves.
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8 hours. Built to be comfortable through a full screen day, so the ache behind your eyes has less to work with.
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~100% UV blocked. Protected at the window desk and on the walk to lunch.
Clear lens
Flow Evening
Simulated tint, for illustration.
☾ Evening lens
77.8%
of evening blue filtered.
That's nearly 8 of every 10 parts of the light that keeps you wired, blocked before it reaches you. Your brain gets the "it's night" memo while you finish your episode.
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1 to 3 hours. Put them on after dinner. No routine overhaul, no giving up your phone.
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60% of warm light still through. The room still looks like a room. Warm, readable, never a muddy red.
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~100% UV blocked. Every night.
How much harsh blue light each lens filters
A clear lens filters about 5% of this blue light. A typical blue-light lens, about 23%. RedSpec Day: 54.5%. RedSpec Evening: 77.8%.
What you'll feel
Better days start the night before.
-
Right away
less glare and squinting. Screens feel easier to look at.
-
Week 1
attention that holds through the afternoon. Fewer screen headaches.
-
Weeks 2 to 4
all-day wear feels normal. Eyes less dry and tired by evening.
-
Night 1
screens feel warmer and softer. Less wired late at night.
-
Week 1
drift off more easily. Calmer, slower evenings.
-
Weeks 2 to 3
more consistent nights, and mornings where you wake up feeling recovered.
Everyone's different. These are the changes we designed for, not promises.
Get Both for $92Straight answers
Most blue-light glasses barely filter anything.
The Evening lens is noticeably amber. That's on purpose. That warmth is what tells your body the day is winding down, so it won't look like your everyday pair.
A faint coating looks like it's working. RedSpec publishes the lab numbers instead: tested wavelength by wavelength, on the same lenses we ship.
| Feature |  RedSpec
|
Typical blue-light glasses | Regular sunglasses |
|---|---|---|---|
| Filters blue light | Yes | Yes | No |
| Day and night lens system | Yes | No | No |
| Optical-grade lenses | Yes | No | Yes |
| Premium acetate frames | Yes | No | Yes |
| Lab numbers published | Yes | No | No |
| 14-night trial | Yes | No | No |
Build your Flow Set
Two pairs. One price.
Step 1: Pick your Day color
For screens, 9 to 6.
Step 2: Pick your Evening color
For the hours before bed. Mix colors if you like.
Flow Day (pick a color)
$92
Flow Evening (pick a color)
$92FREE
Your total: $92 for both. That's $46 a pair.
Free U.S. shipping · Ships same day when ordered by 12PM ET on business days
*Buy 1 Get 1 Free applied automatically at checkout. No code. Limited time.
- Free U.S. shippingon every order, no minimum.
- 14-night trialfeel the difference, or send them back.
- Lab-testedmeasured by an independent lab, 2026.
Worn by people who live on screens
What changes after two weeks.
5.0 from 22 verified reviews
-
★★★★★ Verified buyer
“I was a little hesitant to look different at work and other social environments but this have been one of the best blue light blocking glasses I've had. My eyes were getting really tired at work but this has been a great solution. I also got the orange ones for the night and they have been the perfect combo.”
Ana W.Bought Flow Day -
★★★★★ Verified buyer
“On my second pair. These are sturdy and high quality, been wearing them pretty much every day. I actually do feel a difference when on my computer/phone.”
JessieBought an Evening lens (Nova frame) -
★★★★★ Verified buyer
“Love them so far!”
Brandon B.Bought Flow Day
Worn By
Made to be worn, not noticed
A frame you'll forget you're wearing.
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Plant-based bio-acetate: made from cotton and wood fibers, so it sits lighter and warmer on your face than plastic.
-
Logo-free: nothing on the front but the design.
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Five-barrel hinges: built to open and close every day for years.
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Real optical lenses: CR-39, non-prescription, no magnification.
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The Flow fit: squared lenses with softened corners and a wide keyhole bridge.
Lens 49 mm, bridge 22 mm, temple 148 mm.
The 14-night trial
Wear them for 14 nights.
Give both lenses two real weeks of workdays and wind-downs. If nothing feels different, send them back. Your refund goes to your original payment method within 10 business days.
Questions
Why get both?
Your eyes need different help at different hours. Day is for the desk and the phone. Evening is for the couch and the hour before bed. Most people end up with both, and right now the second pair is free.
Will people notice I'm wearing a tint?
Day, barely. It's a light, soft-yellow tint most people forget they're wearing. Evening is noticeably warm amber, by design.
Are these prescription glasses?
No. Both come with non-prescription optical lenses (CR-39), no magnification.
Can I mix colors?
Yes. Pick Tortoise or Black for each lens.
How fast will they arrive?
U.S. shipping is free. Order by 12PM ET on a business day and it ships the same day. Delivery takes 4 to 12 business days, with tracking by email.
How do I claim the free pair?
Add both to your cart. The second pair comes off automatically at checkout. No code.
Still have a question? Write to see@redspec.co.
Buy 1 Get 1 Free
Sharp at 3pm.
Calm at 11pm.
Flow Day and Flow Evening in the same frame, for $92.
Get Both for $92
Free U.S. shipping · 14 nights to feel the difference, or send them back