Is mulberry silk always better than wild silk?

For bedding specifically, yes — the fiber uniformity that makes mulberry silk gentle on skin and hair is exactly what wild silk lacks. Wild silk has its own textile uses, but a pillowcase isn't where its coarser texture is an advantage.

How do I know a pillowcase is really mulberry silk?

The product description should explicitly say "mulberry silk" or "Bombyx mori," not just "silk," and should list a momme weight (Silkhouse is 22 momme). Certifications like Oeko-Tex add another layer of verification on top.

Real Mulberry Silk

Mulberry Silk Pillowcase: Why the Silkworm Species Actually Matters

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Not All Silk Comes from the Same Silkworm

"Silk" is a broad category — mulberry silk comes from Bombyx mori caterpillars fed exclusively on mulberry leaves in controlled conditions, producing long, uniform, extremely fine fibers. "Wild" or "tussar" silk comes from silkworms feeding on other trees in the wild, producing shorter, coarser, less uniform fibers.

Why That Difference Shows Up on Your Skin

The uniform fiber structure of mulberry silk is what creates the smooth, low-friction surface that benefits skin and hair — coarser wild silk varieties don't have that same consistency, so a pillowcase labeled simply "silk" without specifying mulberry may not deliver the same gentle contact.

      ""100% silk" on a label tells you the fiber category. "Mulberry silk" tells you which silkworm made it — and that's the detail that actually predicts how smooth the fabric will feel against skin.
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Silk Type	Fiber Uniformity	Skin/Hair Feel
Wild/Tussah Silk	Low	Coarser
Unspecified "Silk"	Unknown	Variable
Silkhouse Mulberry Silk	High	Smooth

Look for "Mulberry" Specifically, Not Just "Silk"

The word silk alone doesn't guarantee the fine, uniform fiber that makes the material worth choosing in the first place. Silkhouse pillowcases are 100% mulberry silk, 22 momme, Oeko-Tex certified — no ambiguity about the source.