Really easy are draught excluders. Back strip can be all one piece approx. 6'' x 36''. The front side can be made up of different size rectangles/squares upto 6 x 36 and then join the two together. Leave a space to put the stuffing and handsew the gap. I am not sure what the weather is like in New England at that time of year but its frezing here in the UK and they are popular.