black horse culatta open seam bifold walletthe open seam bifold wallet has been hand cut from a butter soft 1. 8mm vegetable tanned matte black horse culatta leather. 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 extracts such as tree bark, for a truly artisanal and robust finish. crafted