The felt in this bundle is specifically designed for craft use, and made from 30% wool, blended with viscose. The sheets are 1mm thick.
It is not machine washable, but can be ironed with a cool iron. We'd recommend putting a cloth between the iron and the felt to avoid any disasters!
We buy the felt pre-cut so all sizes are approximate, and please remember that there can occasionally be a slight variation in shade from batch to batch.