I made a "summer qui.lt" last year and did not put anything between the 2 pieces of cotton(top and back). I found that it did not have enought body and seemed to wrinkle easily. The one I am now making I am going to put flannel in the center to give it more body. this was suggested by a LQS owner. Also since the flannel will not come apart like batting then you do not have to quilt very close. In fact I am just going to do only enough SID to hold pieces together.