Written by Nordic Light Lab — the UK arm of a Scandinavian family of specialist light-therapy shops, including Lysterapi.no, Norway’s largest light-therapy store with over 10,000 customers. We sell the products we write about, and we say so openly.
Of everything sold as a sleep aid, the humble sleep mask has the simplest and most defensible mechanism: darkness. This short guide covers what actually matters when choosing one, and when the Bluetooth upgrade is worth it.
Why darkness is worth engineering
Your body clock reads light through the eyes even while they are closed. Bedroom light at night — from streetlights to standby LEDs — is one of the most common and least noticed sleep disruptors, and unlike most sleep problems it has a £35 solution. Full blackout also removes the 4 a.m. summer dawn, which anyone in the UK with thin curtains knows well.
Choosing one
Our Vesper Sleep Mask (£35) is a soft blackout mask built for exactly this job. If you like falling asleep to audio, the Bluetooth version (£53) has thin built-in speakers — no earbuds against the pillow, no glowing phone. And for side sleepers who want audio without anything near the eyes, the Sleep Headband with Bluetooth (£35) does the same job in headband form.
Pair it with the right night light
If you need to see your way at night — children, bathroom trips — white light undoes the good work. A red-spectrum night light (£42) or sleep light bulb (£38) lets you see without telling your brain it is morning. Everything carries our 90-day money-back guarantee.
Frequently asked questions
Do sleep masks actually improve sleep?
Darkness is one of the strongest signals your body clock gets. Even small amounts of light in the bedroom - streetlights, standby LEDs, a partner's phone - reach the brain through closed eyelids. A mask that blocks that light removes a real and common sleep disruptor, which is why this is one of the cheapest sleep upgrades with a plausible mechanism.
What should I look for in a sleep mask?
Three things: full blackout with no light leaking at the nose, no pressure on the eyes (contoured or soft masks beat flat elastic ones for side sleepers), and a material you can wash. Everything else is preference.
What is the point of a sleep mask with Bluetooth?
Built-in flat speakers let you fall asleep to audiobooks, podcasts or white noise without earbuds digging into your ear on the pillow - and without the phone screen lighting up the room. It is a niche upgrade, but the people it suits swear by it.
Sleep mask or sleep headband - which is better?
A mask prioritises blackout; a headband prioritises comfortable audio and works for people who dislike pressure near the eyes. Side sleepers who mainly want sound tend to prefer the headband; anyone fighting bedroom light should choose the mask.
What else makes the bedroom darker in practice?
Swap bright white night lights for red-spectrum ones - red light disturbs melatonin far less than white or blue. A dim red night light plus a blackout mask covers both the room and your eyes.