http://www.ebay.com/itm/272115041520

This vintage jacket started life off as a WWII CFN-24 Colvinex flight suit.  These were popular motorcycle jacket conversions post war, due to the relative impracticality of a full length leather flight suit in civilian life, and due to their ease of conversion, with the front zipper having a separable bottom. It is made from goatskin, with a mouton collar, Conmar zipper, chinstrap, under-collar throat latch and belted waist.  The owner of this one opted to cut his off at a 3/4 length, requiring it to also be zipped down from the waist to be put on.