I love the wool battings- hobbs wool or dream wool are both very, very nice, lofty, breathable & warm. the polyester battings are also warm battings, (warm & natural is made by the 'Warm' company- not Hobbs) Hobbs does offer a variety of cotton battings- the 80/20 is nice to work with- the warmth of a quilt also is dependent on the fabric selections- and having flannel will certainly help with the warmth of the quilt.