I use old blankets in between or fleece as it is warmer. i use just regular yarn whatever i have on hand. Im nto making quilts to sell . i make for family members and they want warmth. I dont buy batting as it falls apart after some washings. I get my old blankets at good will and remove any satin ribbon edging at teh top of the blanket. If you want wool, go to an army surplus store, they have lots of wool blankets that can be recycled into something beautiful. but i stay away from wool as im allergic to it. so teh fleece work for me or any old blanket tht could use a face lift. Then i tie it in the corners of each square or so. I have jsut finished a tied quilt and posted it.[ATTACH=CONFIG]452130[/ATTACH]