I have one of these that I inherited from my sister-in-law. She covered it with white flannel and the board is at leat 20 years old and likely older. I do not know when she purchased the insulation sheet. But it is perfect, light weight, and portable, because of the size of my room, I have not attached it to the wall. I use a clothes brush every now and again to clean off those pesky little threads and it is as good as new. I see years and years of use ahead.