all flannels in the U.S. have that warning on them- unless they are made for childrens pj's...flannels marketed for childrens pajama's have a special chemical added to them to make them flame retardant...and fyi- this added chemical washes away after about 20 washes...if you used it for a quilt it is fine...(and some of us have made our kids/grandkids pj's with that same flannel--- personally I don't buy the flannels with the added chemicals. it is nothing to worry about in your quilt- the child is not going to be wearing it- and it is no different than any other cotton fabric you use for quilts