How do I put on the SEI MIO Total Eclipse mask correctly?

Place the mask over your eyes and adjust the strap at the back of your head until it sits snugly but comfortably. Ensure the nose bridge piece seals any light gaps before use.

1 4

Images are for illustration purposes only

SEI MIO - Total Eclipse - Deluxe Blackout Mask

✔️ Creates near-total darkness for deeper, uninterrupted sleep
✔️ Contoured shell prevents direct pressure on eyelids
✔️ Adjustable strap fits a wide range of head sizes
✔️ Suitable for sleep, travel, shift work, and sensory play
✔️ Dual-purpose design for sleep support and consensual bondage use

Price Checker

£19.99

Sale Sold out

Lowest price guarantee
Includes FREE private prescription

Quantity

View full details

What Is a Blackout Sleep Mask and How Does the SEI MIO Total Eclipse Work?

Getting a genuinely dark sleeping environment is harder than it sounds. Street lights, phone screens, early morning sun — they all chip away at your sleep quality in ways you might not even notice. The blackout sleep mask from Sei Mio's Total Eclipse range is designed to solve exactly that. Priced at £19.99, it offers complete light elimination in a single, wearable product. Whether you're a shift worker trying to sleep during daylight hours, a frequent traveller, or simply someone who wants deeper, uninterrupted rest, this mask is built with you in mind. It also sits within the Sei Mio 2.0 bondage range, making it equally suited to consensual sensory deprivation play between adults.

Sleep is genuinely important for physical and mental health. The NHS notes that most adults need between seven and nine hours of sleep per night, and that poor sleep is linked to a range of health problems including low mood, reduced concentration, and weakened immunity. Light exposure at night suppresses melatonin — the hormone that signals to your body it's time to sleep. A well-fitted blackout mask addresses this directly, without medication. If you're also exploring other aspects of your wellbeing, you might find our sleep aid collection useful alongside lifestyle tools like this one.

How Does the SEI MIO Total Eclipse Mask Create Complete Darkness?

The contoured inner shell sits away from the eyelids, preventing pressure on the eyes during wear.
A moulded nose bridge piece seals the gap at the bottom of the mask, blocking light that typically leaks in from below.
The adjustable rear strap allows a custom fit across different head sizes, maintaining consistent contact with the face.
The outer shell is constructed from opaque material that absorbs rather than reflects ambient light.

Together, these features create a near-total blackout effect. Unlike thin fabric masks that let light bleed through, the Total Eclipse's structured design means you're not relying on fabric density alone. The result is a stable, comfortable darkness — whether you're sleeping or engaging in consensual sensory play.

Who Should Consider Using the SEI MIO Total Eclipse Mask?

This mask is designed for adults. It's particularly well-suited to people whose sleep is regularly disrupted by light — but its uses go beyond that. Here's a quick overview of who tends to benefit most:

Shift workers sleeping during daylight hours
Frequent travellers dealing with unfamiliar light environments or jet lag
People with light-sensitive sleep patterns or insomnia
Consenting adults exploring bondage or sensory deprivation as part of intimate play

It is not suitable for children. If you have a skin condition around the eye area — such as eczema or contact dermatitis — speak to a pharmacist before use. People who experience claustrophobia should also consider whether a close-fitting mask is appropriate for them.

How Does the SEI MIO Total Eclipse Compare to a Standard Sleep Mask?

Feature	SEI MIO Total Eclipse	Standard Fabric Sleep Mask
Light blocking	Near-total blackout via contoured shell	Partial — fabric allows light bleed
Eye pressure	None — contoured design lifts away from lids	Fabric rests directly on eyelids
Adjustability	Adjustable strap for custom fit	Elastic band — limited adjustment
Dual use	Sleep and consensual sensory play	Sleep only

Is the SEI MIO Total Eclipse Mask Safe to Use Every Night?

For most adults, wearing a blackout sleep mask nightly is considered safe. The key is fit — a mask that's too tight can cause pressure around the temples or bridge of the nose over time. Always adjust the strap so the mask sits snugly without digging in. If you notice any redness, skin irritation, or discomfort after use, remove the mask and allow the skin to recover before trying again.

For bondage or sensory deprivation use, the mask should only ever be used between consenting adults with clear communication and agreed boundaries in place. Never use it in a way that restricts breathing or leaves someone unsupervised. If you're managing sleep difficulties alongside other health concerns, our men's health collection includes additional products that may support your overall wellbeing.

This product is a non-medicated device. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

SEI MIO - Total Eclipse - Deluxe Blackout Mask specifications

Treatment category	Sleep support / Sensory deprivation / Bondage accessory
Mechanism of action	Physical light elimination via contoured opaque shell and adjustable strap
Effective for	Light-disrupted sleep, shift work, travel, consensual sensory play
Suitable for	Adults only
Active ingredient	None (non-medicated device)
Pack sizes	Single mask
UK classification	General sale / Non-medicinal product
Preparation	Wearable mask
Route of administration	External (worn over eyes)

Specifications of SEI MIO - Total Eclipse - Deluxe Blackout Mask

What Is the SEI MIO Total Eclipse Mask and What Is It Used For?

The SEI MIO Total Eclipse Deluxe Blackout Mask is a non-medicated, wearable eye mask designed to block out all ambient light. It belongs to the Sei Mio 2.0 range and serves two primary purposes: improving sleep quality by eliminating light exposure, and providing a sensory deprivation experience for consenting adults during bondage or intimate play.

Light is one of the most significant disruptors of natural sleep. When light enters the eye — even through closed lids — it can suppress melatonin secretion and delay the onset of sleep. The NHS recommends keeping your bedroom as dark as possible as part of good sleep hygiene. This mask supports that goal without any pharmacological intervention. It is not a medical device and does not treat any clinical condition, but it can be a practical, non-invasive tool for people whose sleep is regularly affected by light.

What Do You Need to Know Before Using the SEI MIO Total Eclipse Mask?

Before using this mask, there are a few things worth considering. It is intended for adult use only and should never be used on children. If you have any of the following, take extra care:

Active skin conditions around the eye area, such as eczema, psoriasis, or contact dermatitis
Recent eye surgery or injury — consult your GP or ophthalmologist before use
Claustrophobia or anxiety related to facial coverings
Sensitivity to synthetic materials — check the product materials before first use

For bondage or sensory deprivation use, the following safety points are essential:

Always use with a consenting, informed partner
Establish a clear safe word or signal before beginning
Never leave the wearer unsupervised
Do not use in a way that restricts breathing or causes distress

There are no known drug interactions associated with this product, as it contains no active pharmaceutical ingredients.

How Should You Use the SEI MIO Total Eclipse Mask?

Using the mask correctly makes a real difference to both comfort and effectiveness. Follow these steps for the best experience:

Wash your hands before handling the mask.
Hold the mask with the contoured side facing your face and the strap at the back.
Place the mask over your eyes, ensuring the nose bridge piece sits snugly against the bridge of your nose.
Pull the strap over the back of your head and adjust until the mask feels secure but not tight.
Check for any light gaps — particularly around the nose — and readjust if needed.
For bondage use, ensure your partner is comfortable and that communication remains possible throughout.

Use Case	User Group	Recommended Duration	Frequency
Sleep support	Adults	Full sleep duration (up to 8–9 hours)	Nightly as needed
Daytime napping / shift work	Adults	Duration of nap	As required
Travel / jet lag	Adults	Duration of journey or rest period	As required
Consensual sensory play	Consenting adults only	Agreed, supervised duration only	As agreed between partners

If you're exploring sleep support alongside other health tools, our personal lubricants and sexual health range may complement your Sei Mio 2.0 experience.

What Are the Possible Side Effects of the SEI MIO Total Eclipse Mask?

Because this is a non-medicated product, side effects are generally related to physical wear rather than any chemical or pharmacological action. Most people use it without any issues at all. That said, it's worth knowing what to look out for.

Common side effects:

Mild pressure or indentation marks around the nose or temples after prolonged wear
Slight warmth or sweating around the eye area during sleep
Initial discomfort while adjusting to wearing a mask during sleep

Less common side effects:

Skin irritation or redness around the contact areas, particularly in those with sensitive skin
Headache if the strap is worn too tightly
Anxiety or discomfort in individuals with claustrophobia

If any irritation persists, discontinue use. For persistent skin reactions, consider visiting our skin care collection for suitable soothing products, or speak to your pharmacist.

How Should You Store the SEI MIO Total Eclipse Mask?

Store in a cool, dry place away from direct sunlight
Keep away from sharp objects that could damage the shell or strap
Clean the mask regularly according to the manufacturer's instructions — do not submerge in water unless specified as waterproof
Store in the original packaging or a protective pouch when not in use
Keep out of reach of children

References

✦

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy the SEI MIO Total Eclipse blackout mask online in the UK?

You can buy the SEI MIO Total Eclipse Deluxe Blackout Mask directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for £19.99. It's available for discreet delivery across the UK. Simply add it to your basket and check out securely on the Cured Pharmacy website.

How does the SEI MIO Total Eclipse blackout mask work?

The mask works by physically blocking all ambient light from reaching your eyes using a contoured opaque shell and a moulded nose bridge piece that seals light gaps. This creates near-total darkness, which supports natural melatonin production and can help you fall asleep faster. It can also be used for consensual sensory deprivation during intimate play.

How do I put on the SEI MIO Total Eclipse mask step by step?

Place the contoured side of the mask over your eyes and position the nose bridge piece against the bridge of your nose. Pull the adjustable strap over the back of your head and tighten until the mask feels snug but comfortable. Check for any light leaks around the nose area and readjust the strap or nose piece as needed.

Is the SEI MIO Total Eclipse mask suitable for side sleepers?

Yes, the contoured shell design is intended to accommodate various sleeping positions, including side sleeping, without pressing directly on the eyelids. The adjustable strap helps keep the mask in place even as you move during the night. If you find the mask shifts during sleep, try tightening the strap slightly before bed.

Can the SEI MIO Total Eclipse mask cause skin irritation?

Some users with sensitive skin may experience mild redness or irritation around the nose bridge or temple contact areas after prolonged wear. If this happens, discontinue use and allow the skin to recover. You can browse our skin care collection for suitable soothing products, or speak to your pharmacist for advice.

Who is the SEI MIO Total Eclipse mask suitable for?

The mask is suitable for adults who experience light-disrupted sleep, including shift workers, frequent travellers, and people with insomnia. It is also designed for consenting adults who wish to explore sensory deprivation as part of bondage or intimate play. It is not suitable for children or for unsupervised use during bondage activities.

What is the best time to use the SEI MIO Total Eclipse mask?

For sleep purposes, put the mask on just before you intend to sleep — whether that's at night, during a daytime nap, or on a long-haul flight. For sensory play, use it only when both partners are fully prepared and have agreed on boundaries and a safe word. Avoid wearing it for extended periods beyond your intended sleep or play session.

How long can you wear the SEI MIO Total Eclipse mask safely?

For sleep use, the mask can be worn for a full night's sleep — typically seven to nine hours for most adults, as recommended by the NHS. For bondage or sensory deprivation use, wear duration should be agreed in advance between partners and should never be extended beyond what is comfortable. Remove the mask immediately if you experience any discomfort, pressure, or skin irritation.

What are alternatives to the SEI MIO Total Eclipse blackout mask?

Alternatives include standard foam sleep masks, weighted eye masks, or blackout curtains for your bedroom. Within the Sei Mio 2.0 range, there may be other sensory accessories that suit your needs. For sleep difficulties that go beyond light exposure, our sleep aid collection includes additional non-prescription options worth exploring.

Does the SEI MIO Total Eclipse mask help with insomnia?

The mask can help address one specific cause of insomnia — light exposure — by creating a dark environment that supports melatonin production. However, insomnia is often multifactorial, and a mask alone may not resolve all sleep difficulties. The NHS recommends a range of sleep hygiene strategies alongside environmental changes, so speak to your GP if insomnia is persistent or severe.

Is the SEI MIO Total Eclipse mask safe to use during bondage play?

Yes, when used responsibly between consenting adults with clear communication, the mask can be used safely for sensory deprivation during bondage play. Always establish a safe word or agreed signal before use, and never leave the wearer unsupervised. Do not use the mask in any way that restricts breathing or causes distress.

How do I clean the SEI MIO Total Eclipse mask?

Clean the mask regularly to maintain hygiene, particularly if used during intimate play. Wipe the inner surface with a damp cloth and mild soap, then allow it to air dry fully before storing. Do not submerge the mask in water unless the manufacturer's instructions confirm it is safe to do so.

Can I use the SEI MIO Total Eclipse mask if I have had eye surgery?

If you have recently had eye surgery — such as cataract removal, LASIK, or any procedure involving the eyelids — consult your GP or ophthalmologist before using any eye mask. Pressure or contact around the eye area during recovery could interfere with healing. Once you have been given the all-clear, the contoured design of this mask minimises direct eyelid pressure.

What are the latest findings on using blackout masks for sleep quality?

Research consistently supports the role of darkness in promoting healthy sleep by facilitating melatonin secretion from the pineal gland. The NHS recommends keeping your sleeping environment as dark as possible as part of good sleep hygiene. While large-scale clinical trials specifically on blackout masks are limited, the underlying physiological rationale is well established in sleep medicine literature.

Is the SEI MIO Total Eclipse mask suitable for people with claustrophobia?

People who experience claustrophobia or anxiety related to facial coverings should approach this product with caution. The contoured shell sits away from the eyelids, which some users find less restrictive than flat fabric masks, but individual responses vary. If you are unsure, try wearing the mask for a short period in a safe, comfortable setting before using it for a full night's sleep or during play.

How Should You Use the SEI MIO Total Eclipse Mask?

Using the SEI MIO Total Eclipse Deluxe Blackout Mask correctly ensures both comfort and maximum light elimination. Before your first use, inspect the mask for any damage to the shell, nose bridge, or strap. Clean the inner surface with a damp cloth and allow it to dry fully.

Follow these steps each time you use the mask:

What Is the Correct Dose of the SEI MIO Total Eclipse Mask?

This is a non-medicated wearable device, so there is no pharmaceutical dose. However, appropriate duration of use varies depending on your intended purpose. The table below provides a practical guide.

When Is the Best Time to Use the SEI MIO Total Eclipse Mask?

For sleep purposes, put the mask on immediately before you intend to sleep — whether that's at your usual bedtime, before a daytime nap, or during a long-haul flight. Wearing it too early in the evening while still active may feel uncomfortable and is unlikely to be beneficial.

For sensory deprivation or bondage use, timing should be agreed between partners in advance. Both individuals should be fully alert, sober, and prepared before the mask is applied. Never use the mask when either partner is fatigued to the point of being unable to communicate clearly.

How Long Can You Use the SEI MIO Total Eclipse Mask For?

There is no strict limit on how long you can use this mask across your lifetime — it is a reusable product designed for ongoing use. For individual sessions, sleep use is appropriate for a full night's rest of seven to nine hours. Remove the mask if you experience any discomfort, skin irritation, or pressure during wear.

Inspect the mask regularly for signs of wear, particularly the strap and nose bridge seal. Replace the product if the shell becomes cracked, the strap loses elasticity, or the nose bridge no longer creates an effective seal. Regular cleaning will extend the product's lifespan and maintain hygiene.

Do not exceed the recommended use duration for your intended purpose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of the SEI MIO Total Eclipse Mask?

Because the SEI MIO Total Eclipse Deluxe Blackout Mask contains no active pharmaceutical ingredients, side effects are physical rather than pharmacological. Most users experience no problems at all. The most commonly reported issues relate to fit and prolonged contact with the skin.

Mild pressure marks or indentation around the nose bridge or temples after extended wear
Slight warmth or sweating around the eye area during sleep
Initial discomfort or unfamiliarity when first wearing a structured mask during sleep
Minor strap-related pressure at the back of the head if adjusted too tightly

What Are the Less Common Side Effects of the SEI MIO Total Eclipse Mask?

A smaller number of users may experience the following, particularly those with sensitive skin or those wearing the mask for extended periods:

Skin redness or irritation at contact points — particularly around the nose bridge and temples
Mild headache if the strap is worn too tightly
Anxiety or claustrophobic feelings, especially in first-time users or those with a history of claustrophobia
Dry eyes upon waking, in users who sleep with their eyes partially open

If any of these occur regularly, try loosening the strap slightly or taking a break from use for a night or two to allow the skin to recover.

What Are the Serious Side Effects of the SEI MIO Total Eclipse Mask?

Serious side effects from a non-medicated eye mask are rare. However, you should stop using the product immediately and seek medical advice if you experience any of the following:

Persistent or worsening skin rash, blistering, or allergic reaction around the eye area
Eye pain or changes in vision after use
Significant anxiety, panic, or psychological distress — particularly during bondage use

If you have a known allergy to any of the materials used in the mask's construction, do not use the product. Check the manufacturer's material information before first use.

What Should You Do If You Experience Side Effects?

For mild side effects such as skin marks or slight discomfort, adjusting the strap tension is usually sufficient. Ensure the mask is clean before each use, as residue from skin products or sweat can contribute to irritation. If skin irritation persists beyond 48 hours after discontinuing use, consult your pharmacist or GP.

For bondage-related use, if the wearer experiences distress at any point, remove the mask immediately and ensure they are comfortable and able to communicate. Do not resume use until both partners feel ready and have discussed what occurred.

Can the SEI MIO Total Eclipse Mask Interact With Other Products?

As a non-medicated device, the mask has no known pharmacological interactions with medicines. However, if you apply skincare products, eye creams, or facial oils before bed, these may transfer to the inner surface of the mask and cause irritation over time. Allow any topical products to absorb fully before putting the mask on, and clean the mask regularly to prevent product build-up.

If you are concerned about any side effects, contact your pharmacist or GP immediately.