I have used only Warm and Natural batting in mine. From the Quilts for Kids FAQ:----------------------------------------------------------What type of batting should I use? Please use LOW LOFT 1/8 to 1/4 inch batting. Cotton or poly or a combination of the two is acceptable.-----------------------------------------------------------I never worried about the cost of the item or the shipping amount since I have only done 4 or 5 of these. It might be worthwhile if you make a lot of them.Pam