i have used this same batting in 3 different quilts in the past year...it is wonderful to work with...and i did not pre-shrink it...i have never pre-shrunk a batt and have never (quilting since 1976) had a problem with a quilt because i did not pre-shrink the batting...to me that is such a waste of my time. (just me)
the quilts i made with the bamboo/cotton blend batts have held up to numerous washings (teen's quilts) they have wonderful drape and were a joy to work on.