If you’ve been shopping for silk pillowcases, you’ve probably noticed a number followed by the word momme. That number matters more than most people realize — and when combined with silver-ion innovation, it turns ordinary silk into a clinically informed material for cleaner, calmer rest.
At ZILK, we use 25 momme Mulberry silk infused with SILVADUR™ silver-ion technology to deliver both luxury texture and real, science-backed function.
What “Momme” Really Means
Momme (pronounced mommy) measures the density and weight of silk. The higher the momme count, the more tightly woven the fabric — creating a smoother, more durable surface that resists thinning or pilling.
Most silk on the market ranges from 16–23 momme. ZILK’s 25 momme silk uses longer 6A-grade fibers and a denser weave that:
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Reduces friction to help minimize sleep creases and irritation.
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Retains its sheen and strength through years of nightly use.
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Creates a uniform, light-reflective finish that feels cool and soothing to the touch.
The Science of Silver Ions: How SILVADUR™ Works
Every ZILK pillowcase is treated with SILVADUR™, a patented silver-ion technology from Dow that helps fabrics stay cleaner between washes. It works through a Smart Release™ system: microscopic silver ions are bound to the fabric and released only when unwanted microbes are present.
This controlled release helps:
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Inhibit the growth of odor-causing bacteria on the surface of the silk.
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Maintain fabric freshness longer between washes.
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Support clearer, calmer skin by reducing environmental buildup on the pillowcase surface.
SILVADUR™ is BLUESIGN® approved and OEKO-TEX® Standard 100 certified, meaning it meets strict safety and sustainability standards and is gentle on skin.
It’s an innovation widely used in medical and performance textiles — now adapted for nightly beauty and sleep care.
Skin Health, Supported by Science
Friction, moisture imbalance, and bacteria are three of the biggest disruptors to skin clarity.
ZILK’s combination of 25 momme Mulberry silk + SILVADUR™ addresses all three:
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Friction Control: The ultra-smooth surface reduces micro-folding of the skin overnight.
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Hydration Support: Silk’s low absorbency keeps your skincare on your face — not in your pillow.
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Cleaner Rest: Silver-ion infusion helps inhibit bacterial growth for a fresher sleep surface.
Together, these qualities support barrier recovery and a healthier-looking complexion over time.
The Sensory Science of Calm
Beyond the clinical benefits, silk also engages the senses. Its cool, breathable texture activates the body’s parasympathetic response — the “rest and restore” mode — helping the nervous system downshift before sleep. That tactile calm is part of why silk has been used for centuries as both a luxury fabric and a wellness tool.
Designed with Clinical Insight
ZILK was founded by Elizabeth Cook, PA-C, a board-certified Physician Assistant and aesthetic medicine expert who spent years advising patients on post-procedure skin recovery.
She noticed one simple recommendation made the biggest difference: sleep on silk.
When she couldn’t find silk that met her medical standards, she created ZILK — merging science, sustainability, and sensory restoration.
The Ritual of Restoration
Each night, your ZILK pillowcase becomes part of your skincare routine. Its 25 momme density protects the skin, while SILVADUR™ technology keeps the surface cleaner between washes.
It’s not luxury for its own sake — it’s evidence-based care made beautiful.
When you rest on ZILK silk, you’re practicing the Ritual of Restoration: small, intentional habits that support skin, sleep, and self.
