I use mostly polyester battings because I like the puffy look and the price is reasonable. For baby quilts I esp. like the batting on a roll that is sometimes available at JoAnn's. (It's about 48" wide and is so much handier to just unroll instead of having to deal with a bigger batt.) My grandkids have used and used their quilts with that batting and it has held up well with heavy use. Recently a friend gave me a high loft poly batt and I'm having trouble with it shifting as I quilt. I usually use a low loft batt and love it for both machine and hand quilting.