Warm and Natural should be your very last choice!! It's hard to hand quilt and it's heavy. I'd go with Quilter's Dream's thinnest weight or one of the newer soy-cotton or bamboo-cotton battings. I just bought some Pellon Legacy Soy-Cotton batting and it's very thin and very lightweight. You can quilt it up to 8 inches apart. One of my friends had a quilt fairly heavily quilted by a longarm quilter with the soy-cotton batting and it's still quite soft and drapeable.