Don't know about the fluffy type batting but on W & N as well as 80/20 type batting, I use the batting tape you can get in rolls of 10yd, 15yd and 100yds. I bought a ton of it awhile back and have gone thru 2-3 rolls already. I piece most all my scraps of batting if a decent size. Smaller pieces I keep for hot pads or testing out a quilting pattern. With the tape you just butt the two pieces next to each other and iron the tape over it. I haven't found that I have to add the tape to both sides either as the tape seems to hold well for me.