Originally Posted by feline fanatic

Rather than 3 layers of batting I highly recommend you check your local Army Navy store or thrift store (salvation army or goodwill) and seek out a wool army blanket. Use that as one layer and wool or Hobbs polydown or quilters dream dream puff over that. Don't quilt it too densely so you get loads of air pockets. Most pantos e2e designs will be fine for that. I guarantee you it will be super warm and heavy. Prewash the wool army blanket so you get any shrinkage out of the way and know it is ok to machine launder and dry in the future. Also pick a pattern with lots of seams like log cabin or Pineapple made with 1 1/2 strips or smaller. All those extra seam allowances will also add to weight and warmth and if you really want to go over the top back it in a high quality flannel like moda double sided flannel or minky type fleece.