Has anyone tried these coverings from F.A.I. Model Supply:?

Air Span synthetic tissue ("mini polyspan"*), or
Lite Span fuelproof synthetic tissue

Both come in white and 8 colors. 

I'm curious if the Lite Span (listed at 30 grams/sq meter) is similar to Tower's Coverlite (28 grams/sq meter).  I have emailed F.A.I. Model Supply to ask if they know the answer.

*25 grams/sq meter

The website is faimodelsupply (dot) com.

Thanks,