oooh! good idea! i think that's what i was going for with the blanket, but that sounds like a better idea.
then again, i could use a lot less of it if i could get far enough into my closet to put some in that window. the window itself is about a foot across and less than 2 feet high, and the hole is only in section piece of the stained glass, but boy does it let in a lot of air! D:
but yes, insulation. perhaps once i get my mom to throw her stuff out (or at least out of my closets), i can do that for the window in there.