Why the Mulberry Silk Percentage on Your Pajama Label Matters
When shopping for velvet sleepwear, many people are drawn to softness, warmth, and appearance. But few pause to examine the fabric label—specifically, the percentage of mulberry silk it contains.
Yet that small number quietly determines how your pajamas feel against your skin, how they regulate temperature, and whether they support or disrupt your sleep.
This article explores the science behind silk velvet—and why fabric composition matters far more than marketing language.
A Controlled Comparison: Measuring Comfort at the Microscopic Level
To understand how different velvet fabrics perform, we conducted a blind wear test in a climate-controlled laboratory simulating a typical winter bedroom environment.
Participants tested two types of sleepwear:
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Silk-backed velvet pajamas (Lining Fabric: 100% Mulberry Silk： Outer Fabric: 100% Viscose Fiber)
Using infrared thermal imaging, we recorded skin temperature changes after fabric contact.
The results were striking:
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After 30 seconds of skin contact, the silk-backed velvet group showed an average skin temperature decrease of 1.5°C
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The synthetic velvet group showed an average increase of 0.9°C
This dual regulation—cooling on contact while retaining warmth—comes from the natural protein fiber structure of mulberry silk. Its unique dumbbell-shaped cross-section creates microscopic air pockets that trap warmth without blocking airflow, producing what we call “breathable insulation.”
Skin Contact Under the Microscope
Thermal comfort is only part of the story.
Under electron microscopy, synthetic fibers reveal sharp, serrated surfaces. Mulberry silk fibers, by contrast, appear smooth and uniform.
This physical difference has measurable effects:
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40% lower friction coefficient compared to synthetic velvet
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Sensitive-skin participants reported that silk-backed velvet felt “almost imperceptible” on the body
In moisture regulation tests, silk-backed velvet absorbed moisture at three times the rate of synthetic velvet, then released it gradually—helping maintain a stable microclimate against the skin and reducing dryness during winter months.
Why 100% Mulberry Silk Matters for Skin Repair
Examining a 100% mulberry silk inner layer under magnification reveals fine surface scales along each fiber. These structures contribute not only to silk’s natural luster, but also to its skin-supportive properties.
Clinical research shows that mulberry silk contains 18 amino acids closely aligned with those found in the human stratum corneum. In dry winter conditions, silk has been shown to:
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Increase skin hydration by 25%
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Reduce transepidermal water loss (TEWL) by 30%
This is why silk is often described as a “second skin.”
Real-World Results: What Wearers Experience Over Time
SILKGALA’s consumer research supports these findings.
Among users with sensitive skin:
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83% reported reduced winter itching after wearing 100% mulberry silk sleepwear for 30 days
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Sleep quality scores improved by 40%
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After six months of consistent use, measurable improvements in skin barrier indicators—such as stratum corneum thickness and natural moisturizing factor levels—were observed
The effect is cumulative: the longer the silk is worn, the more resilient the skin barrier becomes
From Percentages to Lifestyle Choices
Paying attention to the mulberry silk percentage on your sleepwear label is not about chasing numbers—it’s about choosing a more intentional way of living.
Because true comfort—and true healing—has always lived in the details.
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