I have been thinking about this too and haven't found much info. The problem is that many buttons look nice and are just the right quality for everyday wear and cleaing, others need more care. Some buttons will not stand up to heat and can brake off. I once put on a shirt straight from the thumble dryer, the buttons popped off the stitching like they were made of sugar paste (it was a loose fitting shirt). Sellers should give more info on what type of plastic is used and if they can take 60 degrees in the thumble dryer or not. There used to be these flat metal buttons coverd with fabric used on bed linen. They could be mangle and still be one piece. We just need to be able to choose the right material for the purpose.