Generally, all jelly rolls are not pre-washed and should NOT be washed prior to piecing as they would ravel into a big ball of yuck. I'm guessing this is a Hoffman batik jelly roll? I have read threads on here about them not being cut as accurately as one would have hoped. I think the packaging even warns of it, oddly.
We're on vacation in Destin, FL, and went to a quilt shop down here that had some jelly rolls on clearance for $20 each, so I snatched them up as well. Love a bargain!