In this study, the effects of different finishing types on water vapour and air permeability properties of upper leathers were investigated. The leathers were classified into three groups based on finishing types like aniline, pigmented and patent finishing. The water vapour and air permeability tests were applied to all leathers before and after finishing processes for determining the change in these properties. The water vapour and air permeability values of unfinished box calf and goat leathers were found to be considerable high prior to finishing process; however these values were significantly decreased after this process. It was determined that the patent finishing significantly reduced the water vapour and air permeability values and the minimum decrease was observed with aniline finishing.