i wash mine in the washing machine.....no mesh bags, just drop them in.
i then air dry them.
have never had a problem and they come out looking good.
i wont buy any other slippers now. they are the first thing i change into when i enter the house. i want to try their open toed ones.
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"The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing." - Albert Einstein