Silk Sleep Mask

The material against your face matters most. Most masks sold as ‘silk’ or ‘satin’ are polyester — a petroleum-derived fabric that traps heat, doesn’t breathe, and sheds microplastics against your skin for 8 hours a night. This mask is 100% mulberry silk on both sides at 22 momme weight — the highest density commonly available. It blocks light completely, regulates temperature naturally, and the surface against your face is protein, not petroleum.

Yes. Even dim light during sleep suppresses melatonin and disrupts slow-wave sleep stages (Cho et al., 2016). Melatonin suppression begins at just 1.3 lux — far below a streetlight through curtains (Zeitzer et al., 2000). Total darkness is required for unrestricted melatonin synthesis. A properly fitting mask that blocks all light achieves this without blackout curtains.

Yes — and it’s the single biggest thing to check before buying. Satin is a weave, not a material. Most masks sold as ‘silk satin’ or just ‘satin’ are polyester in a satin weave. The feel is similar at first touch, but polyester doesn’t breathe, doesn’t regulate temperature, sheds microplastics, and traps sweat against your skin for 8 hours a night. Real mulberry silk is a natural protein fibre — hypoallergenic, temperature-regulating. This mask is 100% mulberry silk on both sides.

Momme is the unit used to measure silk density. Higher momme = thicker, more durable, softer silk. Most silk products are 12–16 momme. This mask is 22 momme — the highest commonly available. The difference is noticeable in durability, light blocking, and how the silk feels against skin.

Yes. Both the outer shell and the inner lining that touches your face are 100% mulberry silk. Many competitors use polyester on one side and silk on the other, or polyester on both sides marketed as ‘satin’.

The adjustable strap holds it in place. The contoured shape sits in your eye sockets rather than pressing flat, so it stays put even for side sleepers.

Hand wash in cool water with mild detergent. Don’t wring — press gently between towels. Air dry flat. Machine washing degrades silk protein fibres.

Yes. The contoured shape creates a dome over your eyes rather than pressing flat against lashes. No contact with the eye area.

Adjust the strap so the contoured cups sit inside your eye sockets — not pressed flat across the bridge of your nose. The dome shape is what blocks light at the temples and nose; a flat-sitting mask leaves gaps in those exact places. Side sleepers: the low profile means it won’t dig in against the pillow. If light still leaks at the bridge, you’ve got the strap too high — slide it down so the lower edge sits flush against your cheekbones.

Polyester sheds microplastic fibres against your skin under friction (Napper & Thompson, 2016) and traps body heat and sweat — your face perspires for 8 hours, and synthetic fabric doesn’t wick. The dye and any wrinkle-resin finish keep migrating as long as you keep wearing it. There’s no way to ‘rinse out’ a finishing chemistry that’s bonded to the fibre. The fastest fix is to replace the contact-side fabric. The slower fix is to keep using it and accept the trade-off.