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Stop Your Pillow From Stealing Your Skincare.

Cosari LumiSilk 22

Woven on both sides from heavy 22-momme Grade-6A long-strand mulberry silk, the Cosari LumiSilk 22 cuts overnight friction by 43%.

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  • Both Sides 100% 22-Momme Grade-6A Pure Mulberry Silk
  • 43% Less Friction Stops Side-Sleeper Cheek Creases &
  • Non-Absorbent Fibroin Weave Keeps Retinol & Night Cream
  • Recessed Hidden Side Zipper + Machine-Washable OEKO-TEX Purity
Cosari LumiSilk 22
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Engineered Like a Clinical Skincare Shield. Woven Like Couture.

Most silk pillowcases either charge $90 for a brand name without a zipper, or sneak thin 19-momme silk and polyester satin onto the underside. We built the LumiSilk 22 to win on every verifiable textile metric.

True 22-Momme Bilateral Density

Woven at a dense 95 g/m² on both sides using top-3% Grade-6A 750-strand mulberry silk—17% thicker than fragile 19-momme cases for multi-year wash durability.

3.2x Lower Skincare Absorption

Cotton acts like blotting paper, wicking up to 60% of your night serum and tretinoin. Natural silk fibroin keeps expensive active ingredients locked onto your skin.

Guarded 50 cm Hidden Side Zipper

A colour-matched invisible micro-coil zipper with a 6 mm inner silk anti-snag guard keeps lofty Queen pillows enclosed all night without scratching or catching hair.

43% Less Cuticle & Cheek Drag

Glass-smooth triangular silk filaments let curls, blowouts, and delicate eye-area skin glide effortlessly across the pillow across 2,500 nightly micro-movements.

How the Cosari LumiSilk 22 Protects Your Skin & Hair for 8 Hours Every Night

1. Non-Absorbent Fibroin Locks In Night Serums

1. Non-Absorbent Fibroin Locks In Night Serums

Plant fibers like cotton and bamboo are bred to absorb liquid—which means they drink your $90 peptide cream, retinol, and natural lipid barrier right off your cheeks. Cosari's tight 22-momme fibroin weave repels excess absorption so your skincare works on your face, not your laundry.

2. Zero-Tug Glide Preserves Blowouts & Cheek Elasticity

2. Zero-Tug Glide Preserves Blowouts & Cheek Elasticity

When your head weighs 10 lbs against a rough cotton weave, rolling onto your side folds your cheek skin and shreds hair cuticles. Our Grade-6A long-fiber charmeuse reduces surface drag by 43%, eliminating vertical morning sleep lines and back-of-the-head frizz halos.

3. Snag-Proof Hidden Zipper + Breathable Cool Sleep

3. Snag-Proof Hidden Zipper + Breathable Cool Sleep

Slide any Standard or Queen pillow inside and zip the recessed side seam shut in 8 seconds. Your pillow never ejects onto the floor at 3:00 AM, and natural amino-acid silk fibers breathe continuously to keep your cheek 2–3°F cooler than heat-trapping polyester satin.

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Cosari LumiSilk 22

Dual-Sided 100% Grade-6A 22-Momme Pure Mulberry Silk • Hidden Anti-Snag Side Zipper • OEKO-TEX Certified

Backed by our 30-Day Money-Back Trial & Full 2-Year Cosari Warranty.

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In Stock: Delivers in 5–7 Business Days. Free insured US delivery with tracking.

30-Day Money-Back Guarantee plus a full 2-Year Warranty.

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Description

Why 22-Momme Grade-6A Matters: Silk weight is measured in 'momme' (mm). Budget 16–19 momme pillowcases use shorter, thinner fibers that catch on dry skin and turn limp after a few washes. Cosari uses 22-momme (95 g/m²) Grade-6A mulberry silk—the longest, strongest, most uniform top 3% of cocoons—giving you liquid-pearl smoothness that survives years of cold delicate washing.

Sizing & Tailored Architecture: Each Cosari LumiSilk 22 measures a generous 20" × 30" (51 × 76 cm) to fit both Standard and Queen pillows—including high-loft down, feather, and contoured memory-foam pillows. Finished in understated champagne-ivory with clean knife-edge French seams and a flush hidden side zipper.

Simple 45-Minute Wash & Care: Zip closed, turn inside out, and place inside a mesh laundry bag. Machine wash cold (30°C / 86°F) on the delicate cycle with pH-neutral liquid detergent (or hand-wash in cold water for 2 minutes). Never bleach or tumble-dry hot; lay flat or hang indoors to air-dry in roughly 45 minutes.

5–7 Day Shipping & 30-Day Returns

Free 5–7 Day US Shipping: Every order ships free with full tracking and delivers in 5 to 7 business days.

30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.

2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.

Why Choose the Cosari LumiSilk 22?

Cosari LumiSilk 22 Detail

Top 3% Grade-6A Long-Strand Cocoons

Continuous 750-meter silk filaments prevent short-fiber pilling, hangnail snags, and dullness over hundreds of nights.

OEKO-TEX Standard 100 Certified Pure

Independently lab-verified free from formaldehydes, heavy metals, and over 350 skin-irritating textile chemicals—safe for sensitive, eczema, or acne-prone skin.

Machine-Washable Reinforced French Seams

Double-stitched interior French seams and a 6 mm zipper guard lip stop the seam-splitting and fraying that ruin lesser silk cases.

Cosari LumiSilk 22 vs. Ordinary Alternatives

Cosari LumiSilk 22Standard Competitors

FeatureCosari LumiSilk 22Standard Competitors
Fabric Purity & Weight100% Grade-6A 22-Momme Silk (Both Sides)19-Momme Thin Silk or Polyester Satin Back
Pillow Closure Engineering50 cm Hidden Side Zipper + 6 mm Anti-Snag GuardOpen Envelope Flap (Pillow Slides Out) or Cheap Zipper
Night Cream & Serum RetentionLeaves 3.2x More Skincare on Your FaceCotton Soaks Up 60% of Night Creams
Sleeping Surface Comfort100% Unbranded Smooth Silk (Zero Logos)Scratchy Embroidered Brand Logo on Corner
Single Queen Pillowcase Price$49.99 (50% Off Direct Offer)$89.00 – $89.95 at Retail Beauty Counters
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What's Included

In the Box
  • 1 × Cosari LumiSilk 22 Pillowcase (Queen/Standard 20" × 30", Champagne-Ivory, 100% Grade-6A 22-Momme Mulberry Silk)
  • 1 × Matte-Ivory Protective Storage & Travel Envelope
  • 1 × Wash & Care Instruction Card (with 2-Year Warranty Registration)
Technical Specifications
  • ['Material Composition', '100% Pure Mulberry Silk (Both Sides — Never Satin-Backed)']
  • ['Silk Grade & Weight', 'Grade-6A Long-Strand • 22 Momme (95 g/m² Bilateral Density)']
  • ['Dimensions & Fit', 'Standard / Queen: 20" × 30" (51 × 76 cm)']
  • ['Closure System', '50 cm Invisible Side Micro-Coil Zipper + 6 mm Inner Silk Guard']
  • ['Colorway & Finish', 'Lustrous Champagne-Ivory • Clean Knife-Edge French Seams (100% Unbranded)']
  • ['Safety Certification', 'OEKO-TEX® Standard 100 Certified Hypoallergenic & Chemical-Free']
  • ['Care Instructions', 'Cold Delicate Machine Wash in Mesh Bag (30°C) • Air Dry Flat (~45 Mins)']
  • ['Trial & Warranty', '30-Night Morning Mirror Guarantee + 2-Year Seam & Zipper Warranty']
Care & Safety
  • Machine washable on Cold Delicate (30°C / 86°F) inside a mesh laundry bag using pH-neutral liquid detergent.
  • Do not bleach, wring, or tumble-dry on heat. Lay flat or hang out of direct sunlight—dries naturally in 45 minutes.
  • Backed by our 30-Day Money-Back Guarantee & 2-Year Warranty
  • Customer Support: support@buycosari.com
In the Box Cosari LumiSilk 22

From Box to 5-Star Beauty Sleep in 30 Seconds

Swipe left for steps 2 and 3

  1. Step 1: Slide Your Pillow Inside
    1

    Step 1: Slide Your Pillow Inside

    Unzip the wide 50 cm side opening and slip your Standard or Queen pillow effortlessly into the champagne-ivory 22-momme silk interior.

  2. Step 2: Zip the Hidden Seam Flush
    2

    Step 2: Zip the Hidden Seam Flush

    Glide the colour-matched invisible zipper shut. The 6 mm inner silk guard prevents fabric snags while locking your pillow securely inside all night.

  3. Step 3: Wake Up Uncreased & Frizz-Free
    3

    Step 3: Wake Up Uncreased & Frizz-Free

    Rest your cheek on cool, breathable Grade-6A mulberry silk. Your night serums stay on your skin and your hair glides with zero morning tug.

Verified Customer Reviews

What 200+ Verified Buyers Say About the Cosari LumiSilk 22

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Based on 247 verified reviews
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4 Stars
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97% of buyers recommend the Cosari LumiSilk 22
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Claire M.3 days ago

The vertical sleep line next to my eye is finally gone in the morning

I turned 37 this year and suddenly the deep fold mark from my percale cotton pillowcase was staying etched into my left cheek until almost noon. After four nights on the Cosari LumiSilk 22, my face glides instead of bunching up—zero morning pillow tracks. The champagne ivory color looks quiet and elevated against plain white sheets, not cheap or overly shiny, and it stays noticeably cool when I flip onto my side.

Verified Purchase · Austin, TX · Cosari LumiSilk 22

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Lauren D.5 days ago

Real thick silk on BOTH sides and a zipper that doesn't eat the fabric

I used to own the $89 envelope-style brand and my down pillow literally slid out onto the mattress every single night because silk has zero friction. Then I tried a cheaper zippered one that chewed a rip right into the seam on week two. Cosari nailed the hidden side zipper—there is a smooth inner guard lip so it glides shut without catching, and zero embroidered logo scratching your cheek when you flip the pillow at 3 a.m.

Verified Purchase · Charlotte, NC · Cosari LumiSilk 22

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Maya R.1 week ago

Stopped my cotton pillowcase from drinking my nighttime skincare

Living in dry Colorado air while using prescription tretinoin meant waking up with tight, flaky cheeks no matter how thick my barrier cream was. Within a week of switching to this 22-momme silk case, my moisturizer actually stays on my skin overnight instead of soaking into cotton fibers. Worth every penny at 50% off.

Verified Purchase · Denver, CO · Cosari LumiSilk 22

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Brianna K.1 week ago

Day-3 curls actually survive at the back of my crown

Anyone with 3B curls knows that terrible matted halo exclusively on the back of your head where it rubs the pillow all night. I hate sleeping in tight bonnets because they slip off or give me a headache. On this silk weave my hair just slides cleanly—I just shake my curls out in the morning with a little water mist and go.

Verified Purchase · Atlanta, GA · Cosari LumiSilk 22

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Suzanne P.2 weeks ago

PSA: Polyester 'satin' traps heat—real mulberry silk breathes

I made the mistake of buying a $16 'satin' pillowcase last summer before realizing satin is just woven plastic polyester. It made my neck sweat like Saran Wrap. This Cosari case is genuine 100% Grade-6A mulberry silk—cool the second your cheek hits it, never traps perimenopause night heat, and feels heavy and substantial.

Verified Purchase · Scottsdale, AZ · Cosari LumiSilk 22

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Natalie W.2 weeks ago

22 momme makes a huge difference if you have dry hands in winter

I bought a 19-momme silk pillowcase two years ago and one dry winter hangnail pulled a massive horizontal run right across the center on week one. This 22-momme weave is noticeably denser and heavier in the hand. Three washes in a mesh laundry bag and air-drying on my towel bar (takes maybe 40 minutes) and it still looks brand new.

Verified Purchase · Seattle, WA · Cosari LumiSilk 22

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Erin H.3 weeks ago

Luxury hotel feel—just wish it came in charcoal gray too

The silk weight, stitching, and hidden zipper are genuinely on par with the $90 boutique pillowcases I've gifted my sister in the past. Only knocking half a star because my bedding is dark slate and I'd love a charcoal option, though the champagne ivory actually looks super crisp as an accent pillow underneath our shams.

Verified Purchase · Chicago, IL · Cosari LumiSilk 22

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tessa_v3 weeks ago

Passed the fiber check—100% real fibroin silk, not a sneaky blend

So many online listings say 'Mulberry Silk' in the headline and hide in the fine print that one side is polyester. Both sides of the Cosari LumiSilk 22 have that unmistakable soft pearl luster rather than a metallic plastic glare, and a tiny loose thread snippet from the inner seam allowance passed the burn test instantly (smelled like hair and turned to fine ash, zero melted plastic bead). Legit.

Verified Purchase · San Diego, CA · Cosari LumiSilk 22

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Megan L.1 month ago

Saved my fine bleached hair from snapping at the temples

My stylist pointed out short broken flyaways along both sides of my hairline from sleeping on textured linen pillowcases. Switched to this a month ago and my blowout stays smooth twice as long with way less static and breakage around my face.

Verified Purchase · Minneapolis, MN · Cosari LumiSilk 22

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David & Kara G.1 month ago

Ordered one for myself, had to order a second after my husband stole it

My husband rolled his eyes when I switched to a silk pillowcase for my skin, then took one afternoon nap on my side of the bed and immediately asked where I got the 'cold pillowcase.' Grabbed two more while the 50% off deal was still running. Washes up beautifully on cold delicate.

Verified Purchase · Nashville, TN · Cosari LumiSilk 22

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Frequently Asked Questions

Are BOTH sides 100% 22-momme pure mulberry silk, or is one side satin/cotton?

Both the top and bottom sleeping surfaces of the Cosari LumiSilk 22 are woven from 100% pure Grade-6A 22-momme mulberry silk (95 g/m²). We never use polyester satin undersides or cotton blends, so you can flip your pillow over at 3:00 AM and enjoy the exact same cool pearl glide on either side.

Can I wash the Cosari LumiSilk 22 in my washing machine?

Yes. Simply zip the pillowcase closed, turn it inside out, place it inside a mesh laundry bag, and wash on a cold delicate cycle (30°C / 86°F) using a gentle pH-neutral liquid detergent (no bleach or fabric softener). Lay flat or hang indoors to air-dry—it dries completely in about 45 minutes.

What pillow size does it fit, and will the zipper scratch my face?

It is tailored to fit both Standard and Queen pillows (20" × 30" / 51 × 76 cm) with generous gusset room for lofty down, feather, or thick contoured memory-foam pillows. The 50 cm micro-coil zipper is recessed inside a tailored side seam pocket with a 6 mm inner silk guard, so it sits completely flush and never touches your cheek or snags your hair.

How do I know this is genuine mulberry silk and not polyester satin?

Every Cosari LumiSilk 22 is woven from certified Grade-6A long-strand mulberry silk and carries OEKO-TEX Standard 100 certification. Unlike synthetic polyester satin (which reflects harsh mirror glare, traps sweat, and melts into a hard plastic bead if singed), real silk has a soft triangular-prism pearl sheen, stays naturally cool, and smells like natural hair if an inner seam thread is burn-tested.

Is there an embroidered brand logo on the pillowcase?

No. We deliberately keep the entire exterior 100% unbranded with clean knife-edge seams. You get two uninterrupted, silky-smooth sleeping surfaces with zero raised embroidery threads to scratch your cheek or leave marks on your skin.

How does the 30-Day Money-Back Guarantee work?

We call it our 30-Night Morning Mirror Guarantee. Sleep on the Cosari LumiSilk 22 for up to 30 nights and wash it according to the care guide. If you don't wake up cooler with visibly smoother hair and fewer cheek sleep creases, contact our support team for a full 100% refund—plus every pillowcase is covered by a 2-Year Seam & Zipper Warranty.

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