No, they don't.
No.
They sell new, low cost mattresses, but don't take used ones. All you can do is throw them away or try to sell them on KSL.
No, they aren't sanitary enough.
Yes
They do not. You can take them to the local dump and that's about it.
I don't see them there either.
I don't think so. It has to do with health code I believe.
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