Sometimes memory foam bedding is being sold as being dust mite proof. Not so.
I have to agree with this post http://dustmiteallergyfacts.com/2011/04/memory-foam-pillows-and-dust-mites/
Over the years I have had people tell me they got a foam mattress because they were told dust mites can’t live on them. While it is true the dust mite can not get down into the middle of a mattress they will live and die on the surface. I’ve yet to talk to anyone who sells the specialized covers that will tell you not to cover the foam products. In some cases the only way to sleep on them is to cover them because some have a very strong chemical odor to them.
I never thought about the chair I sit in but I can see their point. My chair is covered in fabric and I sit in it all day. Guess I should spray it..