Silk vs Satin Silk: What’s the Difference?

Silk is naturally produced by silkworms spinning cocoons. 

Silk is a natural protein fibre produced by silkworms as they spin their cocoons, with each cocoon yielding a single continuous thread up to 1,500 metres long. This long-fibre structure is what gives silk its smooth surface and signature soft lustre, far beyond what shorter staples like cotton or wool can achieve. As a protein fibre, silk shares a similar chemical makeup to human hair and skin, which is part of why it feels so gentle against the body.

Silk is naturally breathable, hypoallergenic, and temperature regulating, keeping you cool on warm nights and warm on cool ones while wicking moisture and resisting dust mites. Once harvested, the raw threads are reeled, twisted into yarn, and woven into fabric, with weight and density measured in momme rather than thread count. Higher momme counts indicate a thicker, more durable weave that holds rich, deep colours through years of use.

Mulberry Silk: The Highest Quality Silk

Mulberry silk is widely regarded as the finest silk available, produced by Bombyx mori silkworms that feed exclusively on mulberry leaves. This controlled diet yields a thread that is rounder, smoother, and stronger than silk from wild silkworms, with a naturally uniform white colour that takes dye beautifully.

The highest grade within this category is Grade 6A, which uses the longest and most consistent fibres for a denser, more durable weave. Mulberry silk bedding is typically woven at 19 to 25 momme, with higher momme counts offering greater longevity and a more luxurious hand-feel. 

What Is Satin if It Isn't Silk?

Satin is the name for a type of weave, not a fibre. It is made by floating several warp yarns over a single weft thread in a repeating pattern, which produces a glossy surface on one side and a duller finish on the reverse. This weave structure causes light to refract differently than it does in a plain weave, giving satin its distinctive smooth, lustrous top surface.

Satin is a weave, not a fibre itself.

Silk Satin

When a satin weave is made using silk threads, the result is silk satin, which combines the natural benefits of silk with the glossy finish of the weave. Silk satin is breathable, soft against the skin, and durable when woven at a higher momme. It is the original and most luxurious form of satin, valued for centuries in fine bedding, lingerie, and formalwear. 

Other Materials

Because satin describes a weave rather than a fibre, satin fabric can be made from almost any long-filament yarn. This is where unscrupulous sellers substitute cheaper materials such as polyester, nylon, or rayon to imitate the look of silk at a fraction of the cost. When a product is marketed as "satin silk", "silky satin", or some similar derivative, it is almost always one of these synthetics or a blend, since they are far cheaper to produce than the real thing.

Silk vs Satin Silk: Comparison Table

Mayfairsilk: Luxury Mulberry Silk Bedding for Your Nightly Needs

All Mayfairsilk bedding are made of pure Grade 6A mulberry silk.

The difference between silk and satin silk comes down to one simple truth: only real silk delivers the breathability, softness, and skin-friendly benefits that make bedding worth the investment. Synthetic satin may mimic the look at first glance, but it cannot match the comfort, durability, or long-term value of the genuine fibre.

At Mayfairsilk, we stock bedding made from Grade 6A Mulberry silk woven at 22 to 25 momme, well above the 19 momme industry standard. Our range carries a signature matte finish that pairs the inherently strong qualities of pure silk with a modern aesthetic, giving you bedding built to feel beautiful and last through years of nightly use. 

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Frequently Asked Questions (FAQs)

What is the difference between silk and satin?

Silk is a natural fibre spun by silkworms, while satin is a type of weave that can be made from any fibre. That means silk describes what the fabric is made of, and satin describes how the threads are woven together. A fabric labelled "satin" is usually polyester, nylon, or rayon, not silk.

Can satin fabrics be made of non-silk material?

Yes, and most satin on the market today is made from synthetic fibres like polyester, nylon, or rayon. These materials are far cheaper to produce and mimic the glossy look of silk without any of its breathability or comfort. If a product is labelled "satin silk" or "silky satin" at a low price, it is almost always synthetic.

How can you check if silk is pure?

Look for a momme rating, which measures the weight and density of the fabric, since real silk sellers always disclose it. Pure silk also feels cool to the touch, warms slightly in your hand, and has a soft, natural lustre rather than a plastic shine. If the seller quotes a thread count instead of momme, that is a clear sign the fabric is not real silk.

What is the highest quality silk?

Grade 6A Mulberry silk is the highest quality silk available, prized for its long fibres, smooth texture, and even colour. It comes from silkworms fed a strict diet of mulberry leaves, which produces a finer and stronger thread than other silk varieties. Bedding made from Grade 6A Mulberry silk at 22 to 25 momme offers the best balance of durability, softness, and longevity.

Are Mayfairsilk bedding pieces durable?

Yes, Mayfairsilk uses Grade 6A Mulberry silk woven at 22 to 25 momme, which is thicker and more hard-wearing than the 19 momme standard found in most silk bedding. The closely guarded weave gives the fabric extra strength while keeping the signature matte finish and smooth hand-feel. With proper care, Mayfairsilk pillowcases and sheets are built to last for years of nightly use.