Yes, wool makes a very warm quilt...that is all I have used for years for comforters...we are fortunate and have a carding mill in our area that makes the wool batts....they do also make polyester batts, but they are not as insulating as the wool. The wool "breathes" and is so cozy to cuddle up in. These are what I use for warmth, and then the pieced hand or machine quilted quilts for looks.