Wool felting
Also: felted wool · matted knit · wool matting
Wool felting is the matting of animal-fiber knits into a dense, fuzzy, shrunken surface after agitation in heat and water. Irreversible, it stiffens the fabric, blurs the stitch definition, and shrinks the piece all at once, so it weighs on both fabric-condition and the garment's fit-driven grade.
How to detect it
- Look for a dense, matted surface where individual stitches are no longer distinct
- Feel for stiffness and a fuzzy, compressed texture unlike normal knit
- Compare dimensions to the tag size — felting shrinks the piece markedly
Grade impact
Felting combines Fabric Condition (30%) with sizing loss. Light surface matting keeps a wool piece near Good (6); heavy felting that has stiffened the fabric, erased the stitch pattern, and shrunk the garment drops it to Fair (5) or Poor (3–4).
Fixability
Not reversible. Felting permanently fuses the fibers, so no soak or stretch fully undoes it. A lightly felted piece can sometimes be repurposed as craft wool, but it can't be restored to its knit state.
How to disclose it
Disclose it as permanent ('wool has felted — matted texture and shrunk from tag size'). Because felting shrinks and stiffens at once, pair the note with actual measurements so buyers know the true size.
Wool felting — frequently asked
- Can felted wool be unshrunk?
- No. Felting permanently interlocks the wool fibers, so unlike simple shrinkage it can't be reversed by soaking and stretching. A lightly felted item might be repurposed as craft material, but it will never return to its original knit texture and size.
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