The patent I linked to above is named "Multi-layer chemical and biological protection fabric for mobile shelters", and it states:
The patent then goes on to state later:
I think it is pretty obvious that the tent material that the article is referring to is the material listed in this patent which does not mention MS by name or description at all. The patent info for the PPE in the article has yet to be published publicly, so it still remains a possibility that it is utilizing MS.