The full answer set.

Deliberately, strongly amber. The tint comes from filtering blue-green light, which can influence the body clock.

Screens, text and entertainment stay usable, and SleepSpec preserves more natural colour than dark-red lenses. Colours will look different, so take them off for tasks that need accurate colour judgement.

The deep-amber lenses block 98% of blue-green light across 400–520 nm, the range the body clock is most sensitive to. Filtration is measured by spectrophotometer, batch by batch.

SleepSpec is built for evening use, with a strong amber tint that blocks 98% of blue-green light across 400–520 nm. Wear them for 1–2 hours before bed rather than throughout the day. When comparing glasses, check their stated filtration and wavelength range rather than relying on the label “blue-light glasses”.

Yes. The same deep-amber lens filters phones, tablets, laptops and televisions, as well as blue-rich LED and fluorescent lighting.

There is one frame and one size: non-prescription, unisex, TR90 with spring-flex hinges, 23 g, with 53 × 41 mm lenses.

You can briefly try them on to check the fit. If they are not right for you, our 30-day returns policy applies: keep them otherwise unused, in resellable condition, with all accessories.

They can be worn over prescription glasses, but they are not a dedicated fit-over model. They usually fit over prescription frames, although this depends on your frame’s shape and size and is not guaranteed. Check that both pairs sit securely and comfortably. SleepSpec does not currently offer prescription lenses.

No. SleepSpec is a lifestyle product, not a medical device. The glasses are made to support a calmer, more screen-friendly evening wind-down. They are not intended to diagnose, treat or cure any condition, and individual results vary.

Yes, on evening amber and blue-light-blocking lenses generally, carried out by independent researchers rather than by SleepSpec. In a randomised crossover trial of 14 adults with insomnia symptoms, amber lenses were linked to approximately 29 minutes more actigraphy-estimated sleep and improved insomnia scores compared with clear lenses.

SleepSpec was not part of that study. Overall evidence for improved sleep is mixed and uncertain, and individual results vary. The Research page sets out the studies with their findings and their limitations.

Put them on 1–2 hours before bed, whenever you are looking at screens or sitting under bright indoor lighting. Take them off at lights-out.

Yes, that is the idea. Read, watch, scroll or work as usual. The lenses do their job while you carry on with your evening.

They are designed for people who use screens or sit under bright indoor lighting in the 1–2 hours before bed. The minimum age is 8 years, and the frame needs to fit securely and comfortably. SleepSpec is not a treatment for sleep disorders; individual results vary.

The minimum age is 8 years. For children and teenagers, check that the frame fits securely and comfortably. This age guidance is not a guarantee of sleep benefits, and SleepSpec is not a medical device.

No. Please do not wear them while driving, especially at night — the deep-amber tint can make it harder to see traffic lights and other signals clearly. They are made for indoor evening use before bed.

The lenses filter blue-green light from screens and indoor lighting. Blue-rich evening light can suppress melatonin and push the body clock — and sleep — later. SleepSpec is designed to reduce that light exposure when worn 1–2 hours before bed. Better sleep is not guaranteed; individual results vary.

The body clock is especially sensitive to short-wavelength light around 480–490 nm. Evening exposure to blue-rich light from screens and indoor lighting can suppress melatonin and delay the body clock and sleep onset. The effect depends on when the light reaches your eyes, how bright it is and how long you are exposed.

It is your body’s roughly 24-hour internal clock, governing your sleep-wake cycle and other daily rhythms. Keeping it steady supports better sleep, energy, mood and focus.

The UK only: England, Scotland, Wales and Northern Ireland. Shipping is free.

Standard UK delivery is estimated at 2–3 calendar days. This is an estimate, not a guaranteed arrival date. Delivery can take longer during especially busy periods.

Your glasses arrive in a black SleepSpec gift box, with the hard case, microfibre cloth and quick-start guide tucked inside. Outer delivery packaging may vary.

You will get a dispatch confirmation with tracking details where available, so you can follow your parcel’s progress. If you cannot find your tracking, email support@sleepspec.co.uk and we will help.

We accept Visa, Mastercard and American Express, plus PayPal, Apple Pay, Google Pay and Shop Pay where available. The options shown at checkout depend on your device and eligibility. Payments are processed securely at checkout.

Enter your email on the product page and we will let you know as soon as SleepSpec is available again.

Our change-of-mind returns period is 30 days from delivery. You may briefly try the glasses on to check fit; otherwise, return them unused, in resellable condition, with all accessories: case, cloth and guide.

You pay return postage for a change-of-mind return. If the item is faulty, damaged or incorrect, we cover return postage. These conditions do not limit your statutory cancellation rights or your rights if the goods are faulty or not as described.

Email support@sleepspec.co.uk with your order number and we will talk you through it. If your item is faulty, damaged or incorrect, add a quick photo so we can put it right with a replacement or refund.

Email support@sleepspec.co.uk with your order number as soon as possible. We will try to stop the shipment, but once your order is being prepared for dispatch this may no longer be possible, even if it has not yet been dispatched.

If we cannot stop the shipment, we will explain how to return it once it arrives. This does not affect your statutory cancellation rights.

Yes. Your glasses are covered for 12 months against manufacturing defects in materials or workmanship under normal use. It does not cover accidental damage, drops, misuse or normal wear and tear. To make a claim, email support@sleepspec.co.uk with your order number and a photo of the issue.

This warranty is in addition to your statutory rights.

Use the microfibre cloth provided, or mild soap and lukewarm water. Avoid harsh chemicals, paper towels and anything abrasive — they scratch the lenses. Dry gently in circular motions with the cloth.