There are several kinds and brands of batting. My favorites are the 80/20 blend by Hobbs and the 100% cotton by Warm and Natural. I think the 80/20 is softer, but after washing I can barely tell the difference between the two. Bamboo is super soft and super expensive. I would avoid the polyester as it can be difficult to quilt. There are other brands, but these are the two I am most familiar with. I hope that helps.