i've washed upholstery and drapery fabric. when it's cotton it shrinks considerably and might bleed (use a color catcher or retayne). it also gets limp because the weave is looser and they've used loads of sizing. it's not bad to work with, but it is definitely bulky. if you do use it, i advise a very light batting or it will weigh a ton and you'll never get out of bed in time to pee.