My sewing room chair is a cheap and cheerful plastic one from Ikea - it is very comfortable to sit on but, being plastic, can be cold. I have had a cushion on it for that reason for ever but the other day decided it was cold on my back (I must be getting old).
I have made myself a small quilt that drapes over the back of the chair and tucks into the hole by the base. Used up some orphan blocks.
