Houppelandes were the height of the early to mid 15th Century.  They used a large amount of fabric and were very full, pulled in by a high belt, worn just under the bust.  The sleeves ranged from loose sleeves, to open sleeves that trailed on the floor, often with a dagged edge.

This houppelande, in the Blue and Gold Sartor Reproduction brocade, 'Luchese'. is based on those seen in the mid-15th Century English manuscripts.  It has loose straight sleeves, and a tall standing collar.  The sleeve ends and hem are edged in Golden Mink fur that was repurposed.  Strips of fur are included for attaching at the neck opening, if desired.  This stunning men's gown is sized 2X.

This gown does not come with a belt, but if you are looking for reproduction pieces, you can find  Belt Ends and  Belt Mounts and more at  Armour and Castings. (opens new tab)   Another good option is  Raymond's Quiet Press.