Look at some of Charismah's quilts that she longarms for members on Quiltingboard. I think she uses poly down batting. Hers have a puffier look than regular cotton. See if the is the look you are going for. I like Hobbs 80/20 batting myself and you will find many other choices. You may need to ask your long armer what batting she likes to work with. She may have preferences and show you some samples.