Slip Pure Silk Sleep Mask

Material and Skin Feel

Slip's whole brand is built on the same proprietary slipsilk used in its flagship pillowcases, and the sleep mask uses it on both faces of the mask, the filler and the internal liner. At 22 momme it sits at the absolute top of the silk weight spectrum, which is what gives the mask its characteristic heft and smoothness instead of the limp drape you get from sub-19-momme satin alternatives. PureWow's tester gave the mask a 93/100 review and called it super soft and feels so good on your skin. The grade-6A long-fiber mulberry yarn also resists pilling for years of nightly wear.

Momme matters because it determines how silk drapes and how it feels against skin. At 22 momme the Slip has measurable weight in the hand and lays flat against the face without rippling or shifting; lower-momme satin masks float and ride up. The trade is that 22-momme silk costs significantly more per square foot to produce, which is the bulk of why the Slip retails at $72 while a 19-momme alternative like the Alaska Bear sells for $14. Long-term reviewers at Duchess of Neverland and PureWow report wearing the same Slip mask nightly for four to five years without deterioration.

Slip's grade-6A mulberry silk is the longest-fiber silk produced commercially, which is what makes the surface feel different from other premium silk masks. Where 5A or 4A silk pills along the bias edge after a year of wash cycles, 6A holds its smoothness through hundreds of washes. The mask is sold in a soft pouch that doubles as a travel case. The brand has built such recognition through its pillowcase line that gifting the Slip mask carries social weight that none of the other masks in this guide match.

Blackout Performance

Where Slip lags behind the Manta Pro and the Alaska Bear is light blocking. The mask is flat-fronted and there is no nose-bridge contour or foam dam at the cheekbones. Reviewers who specifically test blackout note that the flat-against-face architecture cannot seal anatomical gaps around the nose bridge where light infiltrates. If you sleep in a fully dark bedroom and only need to block dawn or a small amount of street light, the mask is plenty. If you do shift work and sleep in broad daylight, it is the wrong tool.

The mask is wider than average for a silk option, which helps it block more peripheral light than a Brooklinen or Alaska Bear. Most testers report being able to fall asleep in a moderately lit room. What it cannot do is seal the nose bridge gap; if any direct light hits that area of your face, you will see it. A simple workaround some long-term users adopt is wearing the mask slightly higher on the face so the bottom edge rests at the upper lip, which improves the cheekbone seal at the cost of leaving a sliver of nose exposed.

Strap and Adjustability

The elastic band is silk-covered and runs flat against the head, which is part of why beauty editors love it: it does not crease hair the way a rubberized elastic does. Slip ships the mask as one size and does not include an adjuster buckle. For most adult head sizes the stretch is tuned correctly, but anyone with a notably small or large head circumference will find the fit either loose or pinchy. The lack of a buckle is also a feature for side sleepers: there is no plastic hardware to dig into the temple when you turn into a pillow.

The one-size design is the most common complaint among reviewers with smaller heads, who report the mask slipping off during the night, and among very large heads, who report mild pinching at the forehead. Slip does not currently offer a sized option. Beauty editors who specifically test for hair-friendliness consistently rate the silk-covered elastic as the best in the category, with no creases or kinks even on people who wear the mask through eight hours of sleep with damp hair.

Comfort and Pressure on Eyes

Slip's filler does cushion the eye area more than a single-layer silk mask, and Poosh's tester wrote the extra padding around the eyes adds a pillow-y component that is so luxurious. That said, the mask still rests directly on the eyelids and after several hours of wear some testers report mild eyelid pressure, particularly for people accustomed to no-touch contoured cups. If you wear lash extensions, Slip sells a separate Contour version with indentations for the eyes; the standard Pure Silk mask reviewed here is not lash-friendly.

Hair, Skin and Sleep-Crease Benefits

The reason most people buy a Slip mask instead of a cotton one is what it does to your face overnight. Mulberry silk's low-friction surface is documented to reduce sleep creases and lines around the eyes, and the breathable fiber does not wick moisturizer off the skin the way cotton does. Beauty editor reviews at PureWow, Poosh and Fashionista all converge on this point: the mask is essentially a skincare-and-haircare accessory that also blocks some light. If your priorities are reversed, look at the Manta Pro or Tempur-Pedic.

Dermatologists who appear in beauty roundups consistently note that silk's smoother surface causes less mechanical stress on the delicate periorbital skin compared to cotton, which can contribute to fine lines from repeated friction. The mask's antimicrobial properties also mean it can stay between washes longer than cotton without harboring bacteria, which matters for acne-prone skin. None of this is unique to Slip; it is a function of pure mulberry silk in general. But Slip's 22-momme density gives the largest dose of those benefits per square inch of the masks in this guide.

Care and Durability

Slip's official care guidance is machine wash cold and lay flat to dry. Most long-term reviewers wash it less aggressively, often by hand in cool water with a silk-safe detergent, which keeps the surface sheen intact. The silk-covered elastic is the weak point and will eventually relax after a few years of nightly use; Slip's lifespan reports usually land in the three-to-five-year range, similar to a silk pillowcase. PureWow's reviewer reported zero rips or stretching after years of nightly use, and Duchess of Neverland's tester reported the mask staying in perfect condition through approximately four years of nightly use across two continents and dozens of washes.

Where It Falls Short

The two recurring complaints are price and light leakage. $72 is the high end for a silk basic, and the Brooklinen mulberry silk equivalent retails for $29 with comparable 22-momme silk. The flat design also concedes the blackout race to any contoured mask, including the much cheaper Alaska Bear. A small minority of reviewers also note that very rich eye creams can mark the silk on the inside of the mask over time, requiring more frequent washing.

Who It's Best For

Buy the Slip if your primary concern is what the mask does to your skin and hair, you sleep in a reasonably dark room, and you have a mid-range budget for a luxe accessory. It is also a sensible pick as a gift because the brand recognition is high and the experience is consistently good. Skip it if you sleep through bright midday sun, need a contoured no-touch design for lash extensions, or want the lowest-cost path to acceptable silk performance, where the Alaska Bear will get you 85% of the way there for under $20.