Eight pillowcases. Three years. The math, the marketing lies, and what actually held up.
I owned 8 silk pillowcases between 2021 and 2024. Three thinned to gauze within six months. Two pilled at the cheek-line. Three held up, and all three were actually 22 momme or higher.
This is the post I wish someone had written before I spent £600 on pillowcases that didn't last. It's also the reason Casa Hush sells one silk pillowcase, not a lineup of them. The market is full of lies about what "silk" means and what "luxury" delivers. The math and the materials tell a clearer story than the marketing copy.
Most of the silk vs satin confusion starts here. People treat them as competing materials. They aren't.
Silk is the protein fiber spun by Bombyx mori silkworms. It comes off the cocoon as a single continuous filament, sometimes up to 1,500 metres long. That fiber gets twisted into yarn, then woven into fabric. The weave can be any pattern, taffeta, charmeuse, georgette, satin.
Satin is one of those weaves, a four-over-one weave that creates a smooth, lustrous surface. Satin can be woven from any fiber: silk, polyester, nylon, cotton. When someone says "satin pillowcase" without qualifying, they usually mean polyester satin. When someone says "silk pillowcase," they usually mean silk woven in a charmeuse (satin) pattern.
So the real comparison is: silk charmeuse versus polyester satin. Both have a smooth shiny surface. The difference is what the surface is made of and how it behaves on your face for the next seven hours.
Silk gets weighed in momme (pronounced "mommy"). One momme equals the weight in pounds of 100 yards of silk that's 45 inches wide. Twenty-two momme silk is denser than nineteen momme silk by, you guessed it, about 15%.
That density does specific things. It drapes deeper. It takes dye more evenly. It resists fraying at the seams. It survives more wash cycles before the fibers thin out. The jump from 19 momme to 22 is the single biggest perceivable difference in how silk feels on a face. You notice it the first night.
Anything below 16 momme is too thin to make a serviceable pillowcase. The luxury standard hovers at 19 because mills make more profit at that weight, less Bombyx mori protein per metre, faster weaving speeds. The brands that price-anchor at $80–120 for a pillowcase mostly sit at 19 momme.
Half of luxury silk pillowcases either don't disclose their momme weight or quietly fudge it. I've seen pillowcases sold as "premium silk" with no number on the website. I've seen "22 momme" claims on pillowcases that weighed measurably less than my Casa Hush 22 momme pillowcase. I've also seen pillowcases marketed as silk that were actually polyester satin with a small percentage of silk threads woven in.
The fix is on the label. If a pillowcase doesn't tell you the exact momme weight, assume 19. If it claims to be silk without a fiber-content percentage, assume it's a blend. If it says "made from silk-blend materials," that's marketing speak for "mostly polyester with a sprinkle of silk."
Casa Hush's Silk Pillowcase is 22 momme mulberry silk, Italian-spun from Setificio Mantellassi in Como, OEKO-TEX certified. We say the numbers because the numbers are what changes the experience.
I'm not anti-satin. Casa Hush sells duchess satin sleep masks, heavyweight polyester satin, woven dense at 140 gsm. For the mask, satin is the right choice. Here's why.
Sleep masks live a hard life. They get sweated on, oiled by night cream, balled up into bedside drawers, washed weekly. Real silk in a mask survives maybe 18 months of that abuse before the fibroin protein thins and the elastic strap degrades. Heavyweight polyester satin survives 5–8 years. The difference matters when the mask sits over your eyes for 56 hours a week.
Satin also takes a machine wash. Silk technically does too, on the delicate cycle in cold water, but most people don't bother and end up hand-washing. Polyester satin handles a regular cycle without complaint.
The reverse is true for the pillowcase. The cheek doesn't sweat the way the brow does. Face oils sit differently against fabric over 8 hours of compressed contact. Silk holds up better there. We tested polyester satin pillowcases for four months in early 2023 and they visibly worn at the contact points by month three. The silk we use in our pillowcase shows no measurable wear after 200+ wash cycles in continuous use.
The internet treats silk like a museum piece. It isn't. Bombyx mori protein is more durable than you'd think, what kills silk is heat (above about 50°C), chlorine, and harsh enzymes in many detergents. Avoid those three things and silk lasts a decade.
Specific care that actually works:
For polyester satin, you can be lazier, cold cycle, mesh bag, mild detergent, never tumble dry (heat warps elastic). The full care guide covers each material in detail.
Here's what I'd buy today, with prices and projected lifespan.
| Option | Price | Lifespan | $/year |
|---|---|---|---|
| Cheap polyester satin (Amazon) | $15 | 4–8 months | ~$22 |
| "Luxury" 19 momme silk (Slip / Lunya / Brooklinen) | $85–110 | 2–3 years | ~$35 |
| 22 momme mulberry silk (Casa Hush) | $88 | 5–7 years | ~$13 |
| Premium duchess satin (Casa Hush mask) | $54 | 6–8 years | ~$8 |
The cheapest pillowcase per year is the best one. This is true for almost everything in the textile category. Industry-wide, the 5-year cost of luxury pieces is lower than the 5-year cost of cheap replacements, but only if the luxury piece is honest about what it is.
For a pillowcase that lasts and improves how your face wakes up, get real silk at 22 momme or higher. There are maybe four brands selling this honestly in 2026, we're one of them. If 22 momme is out of budget, get 19 momme from a brand that discloses it openly, knowing the lifespan is shorter.
For a sleep mask, get heavyweight polyester satin (duchess satin if you can find it) and avoid silk masks. Silk masks are marketed as luxury but most thin within a year of regular use. The Casa Hush Mask is 47 grams of duchess satin woven dense. It survives more years than a silk mask costing twice as much.
For pillowcases on a tighter budget, percale cotton (single-ply, 300 thread count) is the underrated choice. It doesn't have silk's slip, but it's cool, crisp, and lasts forever. Our Sheet Set includes Standard pillowcases in single-ply percale, for many sleepers, those plus the Silk Pillowcase rotated mid-week is the best combination.
The pillowcase you sleep on tonight will touch your face for somewhere between 2,200 and 2,800 hours over the next year. That's more contact time than any other garment in your life. Spending $88 on the right material is reasonable. Spending $15 on the wrong one is more expensive across five years. The math is unromantic but real.
For the materials and certifications we use, see our Silk Pillowcase page. For why we don't make silk masks, see The Mask. For the certification standard we hold our cotton and silk to, see OEKO-TEX Standard 100.