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Clarity Day
$98
Ember Day
Black
$98
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Day lens
Ember Day in Black
$98
Free U.S. shipping. 14-day returns.
- Helps ease eye and head strain on screens
- Helps you stay focused for longer
- Filters ~55% of harsh screen blue
- ~100% UV blocked, bio-acetate frame
Specifications Ember Day
- Made for
- Long screen days, focus
- Lens
- Day, soft yellow
- Screen blue filtered
- ~55%
- Light through
- ~90%
- UV
- ~100% blocked
- Frame
- Plant-based bio-acetate
- Hinges
- Five-barrel
The frame
Ember features a deeper, rounded lens and sculpted keyhole bridge, paired with a subtly geometric browline for a frame that feels modern, unshakable, and just a little unexpected. Thick temples and precision tapering give it presence without weight.
Fit & size
Fits medium faces
Shape Round
Shipping
Free U.S. shipping on every order. Delivery times and international rates are shown at checkout. Full details in our shipping policy.
Returns
Returns are handled under our refund policy. Questions before you order: contact us.
Care
Clean the lenses with a microfiber cloth or mild soapy water, never paper towels. Fold the temples before setting the frame down and store it in its case. Keep acetate away from car dashboards and other high heat.
Day lens
Less strain. More focus.
A soft-yellow lens that filters about 55% of harsh screen blue to help ease eye and head strain through long screen days, so you stay sharp and focused. Colors stay true.
The Day campaign
Long days, clear head.
Desk, cafe, studio, window seat. The lens that keeps the screen hours easy on your eyes.
The science of yellow
Filter the harsh part. Keep the rest.
The Day lens sits low in the harsh blue around 450 nm, then opens up so everything else stays bright and true. Measured by an independent lab, 2026, on the same lenses we ship.
- ~55%
- of harsh screen blue filtered
- ~90%
- of light still through
- ~100%
- UV blocked, indoors and out
- 3.0%
- through at the deepest blue, 400 nm
Lower means more light filtered. The shaded band marks the harsh screen blue, 440 to 475 nm.
- Clear lens 5%
- Blue-light lens 23%
- RedSpec Day 54.5%
| Wavelength | Day |
|---|---|
| 400 nm | 3.0% |
| 410 nm | 13.1% |
| 450 nm alerting blue band | 45.6% |
| 470 nm alerting blue band | 60.3% |
| 500 nm | 74.1% |
| 550 nm | 92.7% |
| 600 nm | 98.7% |
| UV 280-380 nm | ~0% |
Percent of light passing through the Day lens, lab-measured 2026.
Why RedSpec
We publish the numbers.
A faint yellow coating can look like it is working. We filter the light that matters and publish the lab numbers.
| Feature | RedSpec Day | Ordinary glasses |
|---|---|---|
| Filters ~55% of harsh screen blue | – | |
| Keeps ~90% of light, no orange cast | – | |
| Blocks ~100% of UV | – | |
| Per-wavelength lab report, published | – | |
| Plant-based bio-acetate, five-barrel hinges | – |
The frame
Built for the desk, every day.
The frame
Plant-based bio-acetate
Sturdy, lightweight and warm to the touch.
The hinge
Five-barrel hinges
Each pair is finished with five-barrel hinges, the kind built to open and close for years.
The lens
Real optical lenses
Non-prescription CR-39 optical lenses with no magnification, in a light soft-yellow tint.
Protection
~100% UV blocked
True indoors at a screen and outside in daylight.
Questions
Answered plainly
All questionsWhat is the Day lens for?
Day is a soft-yellow lens for long screen days. It filters about 55% of harsh screen blue to help ease eye and head strain, so you can stay focused for longer, while the world stays bright and true.
How much blue light does it filter?
Day cuts more than half of harsh screen blue (about 55%) while 9 in 10 parts of light still get through, so the world stays bright and true. Lab-measured in 2026, with the full wavelength data published.
Will the tint change how everything looks?
Barely. It is a light, soft-yellow tint most people forget they are wearing.
Are these prescription glasses?
No. Every pair comes with non-prescription optical lenses: real CR-39 lenses, no magnification.
Does it block UV too?
Yes. The lens blocks roughly 100% of UV, indoors at a screen or outside in daylight.
Shipping and returns
U.S. shipping is free. Orders placed by 12PM ET typically ship the same business day. Returns within 14 days, unworn and in the original packaging, under our refund policy.
Day frames
