I use Warm & Natural/white all the time. It's supposed to be very difficult to quilt through but I really don't have any issues. It is 100% cotton and everyone to whom I've gifted a quilt raves about how warm it is. I use 100% cotton light weight (think summer) blanket and a 100% cotton quilt on my bed year round. Works wonderfully. Any natural fibers (cotton, wool, silk) will hold body heat. I haven't tried wool or silk although I am anxious to try silk but very pricey. I do like thinner quilts, though.