Gents. I have a great fondness for Fedoras and have been eagerly learning how to work with steam and cleaning techniques. Re-blocking is the process of reshaping the hat crown on good fur felt. I purchased this sad and very delapitated hat with excellent fur felt from online goodwill and decided to see if I could bring it back to splendor. It is from the 1930s I believe. Cleaned and re-blocked it myself.