black reverse horse culatta leather closed seam bifold walletthe highly textured closed seam wallet has been hand cut from a reversed 2. 5mm vegetable tanned horse culatta leather with a visible layer of subdermal cordovan and a matte black aniline dyed finish. culatta is a special cut combined of the rear just above the cordovan, the belly middles and the hind shanks, offering a dense structure, tight grain and medium to firm temper. vegetable tanning is a traditional method of treating the hide using natural