I used the 150mm thick version of https://www.thermafleece.com/product/thermafleece-cosywool-sheep-s-wool-roll
Any issues with smell or mould? How long have you had it for?
Not that I've noticed although i can't really get down there to check. Probably 3-4 years or so?
@gillies started
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I used the 150mm thick version of https://www.thermafleece.com/product/thermafleece-cosywool-sheep-s-wool-roll