it's described as being a poly/cotton blend.
10 5-yard cuts of 90" wide fabric. that's roughly 2 queen size backs from each cut, for a total of 20 backs.
they seem to be all cheater prints, so you'd end up with reversible quilts.
my guess is that they're a lightweight weave. most cheater prints are.
for the price, i'd say that's a pretty good deal.