I found the price of poly batting way cheaper than the rest and as I am new to this craft I wasn't keen on spending much. I have made 4 quilts and was very frustrated when I quilted the first three as no matter what I did they would pucker on the backing. I bought some cotton batting for the last quilt I made and it didn't pucker at all! I think that was because the polyester seems to stretch between the layers but the cotton didn't, it was much easier to work with also. I will not be going the polyester way anymore :!: