Slip and Quince both list 22 momme, 100% mulberry silk. On their own pages, checked November 2, 2026, Slip states a 6A long fiber grade and a charmeuse finish, and its FAQ doesn't mention a certificate. Quince shows $44.90 on its US page and prints OEKO-TEX certificate 1BEHO 078808, but doesn't state a numeric grade. Slip's price wasn't on the Slip pages I could open, so check their product page before you work out the price difference.
I'm Erin Wise, and I started Wink Silk, which sells a third pillowcase. It costs more, and I'll show you the math near the end. I don't work with Slip or Quince. So this page only reports what each brand says about itself, linked at the bottom, and then hands you a checklist you can run on any silk pillowcase, mine included.
What's the difference between Slip and Quince silk pillowcases?
Here's what each brand's own site stated on November 2, 2026.
| Slip | Quince | |
|---|---|---|
| Silk weight | 22 momme ("We guarantee our measurement of 22 momme") | "22mm fabric weight" (mm is shorthand for momme) |
| Fiber and grade, as stated | 6A long fiber, 100% pure mulberry silk | 100% mulberry silk; no numeric grade stated |
| Weave or finish | Charmeuse finish | Not stated |
| Certificate published | None mentioned in its FAQ | OEKO-TEX Standard 100, 1BEHO 078808 (Hohenstein) |
| Closure | Check their product page | Zipper |
| Sizes | Standard/queen 20" x 30", king 20" x 36" | Standard, Queen, King |
| Price | Check their product page | $44.90 on its US page ($69 shown as "traditional retail") |
| Where made | Not stated in its FAQ | China and Cambodia |
| Returns | Prepaid return label; final sale items excluded unless faulty. Check their returns page for the window. | 365 days |
| Test claims | An independent third-party lab found 43% less friction on average than 220 to 360 thread count cotton; a study of over 100 women aged 35 to 65 over four nights, sponsor not stated | None cited on its product page |
A few cells say "check their product page." That isn't a mark against Slip. Those details weren't on the Slip pages I could open today, and I'd rather leave a cell empty than guess.
Is Quince silk the same as Slip silk?
On weight and fiber, they list the same thing: 22 momme, 100% mulberry silk. What differs is what each one puts in writing. Slip writes down a grade and a finish. Quince writes down a certificate number, a country of origin and a return window. If grade is the word you keep seeing, here's what Grade 6A silk means.
Slip's friction number and its study come from Slip, and a brand's test of its own product is that brand's claim. Real silk does reduce friction against your hair and skin compared with cotton. That's all any of us can honestly say.
How do I compare any two silk pillowcases myself?
Run these six checks on Slip, on Quince, on us, on anyone.
- Weight, in writing. Look for a momme number, not just "heavy" or "luxurious."
- Grade, in writing. A number like 6A, not just "high grade."
- A certificate number, not a logo. Enter it at OEKO-TEX Label Check and see that it's valid and which product class it covers. Here's how to use OEKO-TEX Label Check.
- Who ran the test. If the brand paid for the study, read it as the brand talking.
- The return window, and what's excluded. Look for final sale items and condition rules.
- Price per night. Divide the price by 730 for two years of nights. Quince's $44.90 comes to about 6 cents a night.
A logo is a picture. A number is something you can check.
We ran checks like these for real when we evaluated 15 silk makers. Many claimed certification, but most had OEKO-TEX or GOTS, not both. One maker we were committed to answered four careful questions with one or two vague words, stayed on it for a day or two, then disappeared. When my husband, Cooper, messaged the maker we chose, they replied instantly, answered every question and sent every certificate quickly. How fast a brand hands you its numbers tells you something too.
What about Blissy?
If Blissy's on your list, I put it next to Quince in Blissy vs Quince silk pillowcase, and next to Slip and Wink in Blissy vs Slip vs Wink Silk.
Where does Wink Silk fit?
Wink makes Performance Luxury Silk™: 25 momme, Grade 6A, 100% mulberry silk charmeuse with a hidden zipper, crafted by a GOTS & OEKO-TEX certified silk house. Its numbers are public: OEKO-TEX Standard 100 certificate 22.HCN.30712, Product Class I, and GOTS license 00284622. Wink Silk itself is pursuing its own GOTS and OEKO-TEX certifications. 25 momme carries about 14% more silk per square meter than 22, and here's what 25 momme changes.
Wink costs more. The Douceur™ single layer is $185, about 25 cents a night over two years. The Douceur Doublure™ double layer is $245, about 34 cents a night, and its founding edition is 330 hand-numbered founding pieces in Coy™, never restocked. Even the Douceur™ is about four times Quince's US price, and you can check Slip's product page for its current price to compare. Queen only, free US shipping, 30-day returns. Ship date confirmed by email after purchase, and you can cancel for a full refund any time before it ships.
Wink Privé, our free membership, opens November 2, three days before everyone else, so if you want to be there first, join at winksilk.com/pages/founding.
Wink. The brand that shows you the certificates.
Sleep beautifully.
Sources
- Frequently Asked Questions (Slip), checked November 2, 2026
- 100% Mulberry Silk Pillowcase, US (Quince), checked November 2, 2026
- OEKO-TEX Label Check
- GOTS Certified Suppliers Database
Every Wink pillowcase is 25 momme, Grade 6A mulberry charmeuse, and its silk house's OEKO-TEX and GOTS numbers are published for you to check.
Frequently Asked Questions
Is Slip better than Quince?
Their own pages put different things in writing. Both list 22 momme, 100% mulberry silk. Slip states a 6A long fiber grade and a charmeuse finish. Quince doesn't state a numeric grade, but prints OEKO-TEX certificate 1BEHO 078808, says it's made in China and Cambodia, and offers 365-day returns. Checked on each brand's site November 2, 2026.
Is Slip OEKO-TEX certified?
Slip's FAQ, checked November 2, 2026, doesn't mention OEKO-TEX or list a certificate number. It says Slipsilk was tested by an independent third-party lab. Check Slip's product page or ask the brand for a number you can enter at OEKO-TEX Label Check.
What momme is Quince silk?
Quince's US product page lists a 22mm fabric weight, mm being shorthand for momme. Slip's FAQ guarantees 22 momme. Wink Silk is 25 momme, about 14% more silk per square meter.
How much is a Quince silk pillowcase compared with Slip?
Quince's US page showed $44.90 on November 2, 2026, with $69 listed as traditional retail. Slip's price wasn't on the Slip pages checked that day, so check Slip's product page for its current price.
How much does a Wink Silk pillowcase cost?
The Wink Douceur single layer is $185, about 25 cents a night over two years, and the Douceur Doublure double layer is $245, about 34 cents a night. Both are 25 momme, Grade 6A mulberry charmeuse, crafted by a GOTS and OEKO-TEX certified silk house (GOTS license 00284622, OEKO-TEX 22.HCN.30712). Wink costs more than Quince's US price.
