YOUR BEST DAYS START THE NIGHT BEFORE
Why we exist
Everyone wants to feel better, perform better, and get more out of life.
We optimize almost everything—except the one thing we spend a third of our lives doing: sleeping.
That's why we're called ONETHIRD.
Sleep isn't wasted time. It's what prepares you for everything that comes next.
When you sleep better, you wake up with more energy, more focus, and get more out of every day.
That's what ONETHIRD is all about.
Why We Created It
Like many people, we were always looking for ways to get more out of our days.
More caffeine. More productivity hacks. And more ways to stay productive.
Until we realized that the quality of our days starts with the quality of our nights.
That's why we created our sleep mask.
A sleep mask is a simple way to tell your body that it's time to rest. The more consistently you use it, the easier falling asleep and waking up well-rested becomes.
We don't believe in shortcuts or miracle products. We believe that the right products and the smallest habits, repeated every night, can make a remarkable difference over time.
We wanted to make building a healthy bedtime routine simple.
Because we believe great days begin the night before.
And we believe everyone deserves the sleep they need to achieve their dreams.
Meet Onethird
Better sleep doesn't have to be complicated.
We were tired of sleep masks that promise darkness but still let light in — or feel fine for 10 minutes, then start pressing or slipping.
So we decided to design something better: a mask that you no longer feel the moment you put it on, while still blocking out every bit of light.
100% Darkness
Blocks out all light completely for uninterrupted sleep.
Pressure-Free Eye Contour
Ergonomically shaped to avoid any pressure on your eyes.
Ultra-Soft & Breathable Fabric
Made from ultra-soft, breathable materials for maximum comfort.
For Every Moment. Everywhere.
Adjustable, compact and always ready.
Available individually or as a set with a travel pouch and a guided evening routine.
RESERVE NOW
Reserve your ONETHIRD Sleep Set
Secure your spot for 10€ – fully refundable, anytime.
By submitting, you agree to our refund policy and terms of service for the reservation.
Frequently Asked Questions
What's included in the Sleep Set?
The sleep mask, a matching travel pouch, and our tips for a healthy evening routine to help you fall asleep.
What exactly does the 10€ reservation mean and what are the benefits?
The mask isn't available yet, but with 10€ you secure your spot for the launch. The actual opportunity to purchase the mask happens at launch: your 10€ will be fully deducted from the price, and as an early reservee you'll get the best price we'll ever offer.
Still unsure? The 10€ can be refunded at any time.
Alternatively, you can join our email waitlist for free.
When will the ONETHIRD Sleep Set be available?
We're currently working on samples and certification. The launch is planned for Q4 2026. As a reservee, you'll be notified in advance, before the official release.
How can I be notified about the masks launch?
Simply enter your email in the field below and we'll notify you as soon as the mask is available.
How do I get my money back if I change my mind?
Send us an email at info@one-third.de, or use the cancellation button on the website. Your 10€ reservation will be fully refunded.
How can I get in touch?
For any questions, you can reach us anytime at info@one-third.de.