I use 100% polyester batting low loft and I have absolutely no problem sewing the top and batting and fleece together. I lay the batting down and and spray the top half(it is only 60"X 60"). I then take the half folded top and lay it on the unsprayed part and carefully lift the top and spread it out over the sprayed batting if there is a wri kle lift it up and smooth it out...repeat for second half. Next I donthe same only have the fleece on the bottom and sparyit and put the top and batting on it as I did the top and batting. I have no wrinkles and it is easy to sew.I only do SITD.and it turns out perect every time.