can you compost felt?
Yes, but only real wool felt — the stiff colorful craft-store sheets are polyester or acrylic and never break down.
breaks down in 1–3 years torn up and kept wet
C:N ≈ 12:1
which bins can take it?
- hot pile yes
- cold pile caution
- worm bin no
- bokashi no
- tumbler no
- curbside no
- cold pile: Dense mats decay glacially in a slow pile — tear pieces small and bury deep.
- curbside: Felt is textile waste as far as organics programs are concerned.
why?
True felt is wool matted by heat, moisture, and agitation until the fibers' microscopic scales interlock — no weaving, no thread, just dense keratin. That density sheds water, so felt composts even slower than loose wool unless it's torn up and soaked. Craft felt is a different animal entirely: needle-punched polyester that merely imitates the texture.
how to prep it
- Confirm it's wool felt, not polyester craft sheet
- Tear or cut into small pieces
- Soak the pieces — matted keratin repels water stubbornly
watch out for
- Craft felt sold in bright precut sheets is nearly always 100% polyester or acrylic — plastic in a wool costume.
- Hat and industrial felts are often wool-rayon or wool-poly mixes; only the labeled all-wool grades fully decompose.
- Glitter, stiffener, and glued embellishments disqualify a piece regardless of its fiber.
what to do instead
Synthetic craft felt goes in the trash — it isn't recyclable, and scattering it in a pile just seeds compost with plastic fragments.
often confused with
- Acrylic craft felt — The rainbow-colored sheets by the fabric-store register — uniform thickness and squeaky texture betray the plastic.
quick answers
Do wool dryer balls compost when they wear out?
Yes — they're tightly felted 100% wool. Cut each ball into quarters so moisture can reach the core, then treat them like any wool scrap.
How do I test felt with no label?
Hold a trimmed corner to a flame: wool chars and goes out on its own with a burnt-hair smell, while synthetic felt shrivels and melts into a hard edge.