22 momme mulberry silk on both sides, plant-based dyes and independently tested to Oeko-Tex® Standard 100.

Research suggests melatonin suppression can begin at around 1.3 lux — less light than can enter through curtains from a streetlight — and closed eyelids do not completely block light exposure (Zeitzer et al., 2000). While many sleep masks described as "silk" are actually made from polyester satin with wrinkle-resistant chemical finishes, this mask uses 22 momme mulberry silk on both sides, coloured with plant-based dyes and independently tested to Oeko-Tex Standard 100.

Specifications

Material: 100% mulberry silk (both sides)
Shape: Contoured design with total light blocking
Strap: Elastic
Dyes: Plant-based, GOTS-compatible

Materials

• Mulberry Silk (~90%) — Shell & Lining
  Both the outer and inner layers are made from 100% 22 momme mulberry silk, one of the highest silk weights commonly available. Produced from Bombyx mori silkworms fed exclusively on mulberry leaves, the fibres are naturally long, smooth and uniform. Mulberry silk has one of the lowest friction coefficients of any commonly used textile (Kaplan & Okur, 2008), helping to reduce facial creasing and irritation during prolonged overnight use. Naturally hypoallergenic, silk also resists dust mites, mould and bacterial growth while helping regulate temperature by wicking moisture and remaining comfortable throughout the seasons.
• Cotton Fill (~8%) — Padding
  Natural cotton filling provides the contoured shape without relying on memory foam or polyurethane materials.
• Elastic Strap (~2%) — Strap
  A flat elastic strap offers a secure yet comfortable fit while helping to prevent hair from tangling.

Materials Not Used

• Polyester "Satin" (Fabric)
  Satin refers to a weave rather than a fibre, and many sleep masks marketed as silk are actually made from polyester satin. Some use silk only on the outer surface while incorporating polyester lining or filling. This mask is made from 100% 22 momme mulberry silk on both sides, with no synthetic lining or filling.
• Synthetic & Azo Dyes (Dyes)
  Only plant-based dyes are used. Certain azo dyes can release aromatic amines through prolonged skin contact and perspiration, which is why their use is restricted within the EU.
• Memory Foam / Polyurethane Padding (Padding)
  The contoured construction provides effective light blocking without using polyurethane foam against the face during sleep.
• Formaldehyde Wrinkle Treatments (Processing)
  Some lower-grade imported silk products rely on formaldehyde resin finishes to improve wrinkle resistance. This mask uses GOTS-compatible processing instead.
• Plastic Nose Bridge (Hardware)
  There is no plastic nose insert or plasticised elastic. Instead, the mask uses natural rubber elastic enclosed within a cotton sleeve.
• Velcro Closures (Fastening)
  An elastic strap is used in place of Velcro, helping to avoid snagging delicate silk fibres and reducing hair tangling.
• Gel Eye Inserts (Padding)
  Unlike some masks that use PVC or silicone gel inserts for a cooling effect, this design relies on its contoured silk construction to block light without adding extra weight or synthetic materials.

Key Features

• 100% 22 momme mulberry silk on both sides rather than polyester satin.
• High-density silk for durability, softness and improved light blocking.
• Contoured design helps eliminate light leakage around the nose and temples.
• Naturally hypoallergenic silk that resists dust mites, mould and bacterial growth.
• Breathable, temperature-regulating fabric that helps keep you comfortable year-round.
• Smooth silk surface creates less friction against skin than cotton or polyester.
• Comfortable elastic strap designed to fit most head sizes without pressure points.
• Plant-based dyes with no synthetic colourants, azo dyes or heavy metal pigments.
• No memory foam or polyurethane padding.
• Hand wash recommended to help preserve the natural silk fibres.

How to use

1. Position the mask
   Pull the strap until it sits comfortably without pressing on your temples. Snug, not tight.
2. Position the contoured cups over your eyes
   The raised sections should sit in your eye sockets. This is what blocks light at the nose and temples.
3. Sleep
   The mask stays put. If you’re a side sleeper, the flat profile won’t dig in.
4. Hand wash weekly
   Cool water, mild detergent, press dry between towels. Don’t wring silk — it weakens the fibres.

Frequently Asked Questions

What is the best sleep mask?

The material that rests against your skin can make a significant difference. Many sleep masks marketed as "silk" or "satin" are actually made from polyester, a synthetic fabric that retains heat and doesn't offer the same breathability as natural fibres. This mask uses 100% 22 momme mulberry silk on both sides, providing complete light blocking while naturally helping to regulate temperature throughout the night.

Do sleep masks actually help you sleep?

They can. Research suggests that even low levels of light during sleep may reduce melatonin production and affect deeper stages of sleep (Cho et al., 2016). Melatonin suppression has been observed at light levels as low as 1.3 lux (Zeitzer et al., 2000), making complete darkness beneficial for many people. A well-fitting sleep mask can help achieve this without the need for blackout blinds or curtains.

What's the difference between silk and satin sleep masks?

The terms are often confused, but they're not the same. Satin describes a weaving method rather than the fibre itself, and many satin sleep masks are made from polyester. Mulberry silk is a natural protein fibre that is breathable, temperature-regulating and naturally hypoallergenic. This mask is made with 100% mulberry silk on both the inside and outside.

What does 22 momme mean?

Momme is the standard measurement used to describe the weight and density of silk. A higher momme generally means thicker, stronger and more durable silk. While many silk products range from 12–16 momme, this mask uses 22 momme mulberry silk, offering improved durability, softness and enhanced light blocking.

Is it really silk on both sides?

Yes. Both the outer fabric and the inner lining that sits against your face are made from 100% mulberry silk. Some sleep masks combine silk with polyester layers or synthetic fillings, but this design uses silk on both sides.

Will it stay in place overnight?

The elastic strap is designed to provide a comfortable and secure fit. Combined with the contoured shape, it helps keep the mask in position throughout the night, including for many side sleepers.

How should I wash the mask?

Hand wash in cool water using a mild detergent. Avoid wringing the fabric; instead, gently press out excess water between clean towels before leaving it to air dry flat. Hand washing helps preserve the natural silk fibres.

Can it be worn with eyelash extensions?

Yes. The contoured design creates space around the eyes so the mask sits away from your eyelashes rather than pressing directly against them.

How do I achieve the best light blocking?

For the best fit, position the contoured eye cups so they sit comfortably around your eye sockets rather than across the bridge of your nose. This helps seal the areas around the nose and temples where light commonly enters. If you notice light leaking near the bridge of your nose, try lowering the strap slightly so the bottom edge rests closer to your cheekbones.

What if I already own a synthetic "silk" mask?

Many synthetic satin masks are made from polyester, which can retain heat and moisture differently from natural silk. Polyester fabrics may also release microplastic fibres through everyday wear (Napper & Thompson, 2016). Choosing a mask made from natural mulberry silk provides a breathable alternative with a smooth surface that's gentle against the skin during overnight use.

Research

• Cho CH, Lee HJ, Yoon HK, Kang SG, Bok KN, Jung KY, Kim L & Lee EI (2016). Chronobiology International
  This study found that exposure to dim light during sleep (around 40 lux, similar to light entering a bedroom from outside) may affect glucose metabolism and insulin sensitivity the following day. The researchers also noted that closed eyelids do not completely block light, highlighting the importance of a dark sleeping environment.
• Zeitzer JM, Dijk DJ, Kronauer RE, Brown EN & Czeisler CA (2000). Journal of Physiology
  Researchers observed that melatonin suppression can begin at approximately 1.3 lux, a light level considerably lower than typical indoor lighting. Their findings suggest that reducing ambient light during sleep may help support normal melatonin production and healthy sleep patterns.
• Hatori M & Panda S (2010). Trends in Molecular Medicine
  This review explores how artificial light at night can influence the body's circadian rhythm, with potential effects on hormone regulation, metabolism and sleep architecture. Long-term disruption of the biological night cycle has been associated with a range of health concerns.
• Obradovich N, Migliorini R, Mednick SC & Fowler JH (2017). Science Advances
  The authors highlight the relationship between sleep quality and environmental factors such as light and temperature. Maintaining a comfortable sleeping environment may help support more restorative sleep, while breathable natural fibres like silk can assist with temperature regulation.
• Kaplan S & Okur A (2008). Fibres and Textiles in Eastern Europe
  This research found that mulberry silk has a lower coefficient of friction than many common textile fibres, including cotton, polyester and nylon. Its naturally smooth surface may help minimise friction against the skin during prolonged overnight wear.