Spring Sale — Limited Time Only · 99% Blue + Green Light Filtered · Free 8–10 Day Worldwide Shipping · 30-Day Money-Back Guarantee · Trusted by 10,000+ ProfessionalsEnds in 7d 00h 00m
Spring Sale — Limited Time Only · 99% Blue + Green Light Filtered · Free 8–10 Day Worldwide Shipping · 30-Day Money-Back Guarantee · Trusted by 10,000+ ProfessionalsEnds in 7d 00h 00m
Free Worldwide Shipping · 30-Day Sleep Guarantee · Ships in 48 Hours
Wearer of the Kronveil X0-1
The KRONVEIL X0-1

Glasses you'd wear even without the science.

99% blue + green light filtered. 400–520nm. The full spectrum that actually disrupts sleep.

★★★★★ 4.7 · 321 reviews
Secure Yours — $99The Science
Free Shipping
30 Days Guaranteed
Lab-Tested
10,000+ Professionals
The Problem

By 3pm, your screen has already suppressed your melatonin.

2–3 hrs

Average time it takes for melatonin to recover after evening screen use.

400–520nm

The light range most glasses ignore — and the one your circadian system responds to most.

~15%

How much blue light most "blue light glasses" actually filter.

Late-night screen use
No lens vs X0-1 comparison
The Solution

The only glasses designed around the full 400–520nm spectrum.

Blue light glasses typically filter light between 400–450nm. But your brain also responds to green light (450–520nm). Both suppress melatonin. The X0-1 blocks 99% of it — all of it.

Filtered Light Spectrum · 400–520nm
KRONVEIL X0-199% blocked
Typical blue-light glasses~15% blocked
400nm450nm520nm700nm
Kronveil black gift box beside red-lens X0-1 glasses and a carbon-fiber money clip on a laptop
KRONVEIL X0-1 · BIO-SYNC™

Protection. Precision. Restraint.

  • —99% Blue + Green Light Filtered
  • —CR-39 Optical Polymer Lens
  • —Mazzucchelli Acetate Frame
  • —17g · Unisex · One Size
$99.00 USDSave $99
In stock · Only 84 sets left in this batch
MOST POPULAR
BEST VALUE
Secure Yours — $99
30-DAY MONEY-BACK GUARANTEE
Free shipping
Secure checkout
Ships in 48 hours

Built around your evenings.

At Home
At Home
Travelling with Kronveil X0-1
Travelling with Kronveil X0-1
Woman wearing Kronveil red-lens glasses at a desk beneath a red honeycomb wall light
After Hours
Evening use of Kronveil glasses
Evenings
Kronveil red-lens glasses resting on a MacBook keyboard in a dark office
Late Work
Kronveil glasses for outdoor use
Outdoors
Customer wearing the Kronveil X0-1
Customer wearing the Kronveil X0-1
Customer wearing the Kronveil X0-1
4.7 out of 5321 verified reviews

"Finally something that works. I'm falling asleep within 20 minutes instead of lying awake for an hour. The amber lenses look better than I expected."

Customer's KRONVEIL gift box and X0-1 glasses on a desk
James T. · Software Engineer

"I didn't realise how wired I actually was at night. It took me around 2 hours to fall asleep before. Now: under 30 minutes. Took a couple nights to get fully used to the amber tint — but absolutely worth it."

Mei wearing the KRONVEIL X0-1 at her desk in the evening
Mei · Creative Director

"The science is real. Wore them for a week on a long-haul and my sleep quality on the plane was genuinely different."

Customer's KRONVEIL X0-1 resting on a MacBook keyboard during late work
Ravi K. · Consultant

30 Days. No Questions.

Try the X0-1 for a full month. If you don't sleep better, return them for a complete refund. No forms, no conditions, no hassle.

Secure Yours — $99

Built around your evenings.

Restocks, new frames, and the occasional note on circadian research. No noise.

No spam. Unsubscribe anytime.

Secure Yours