The palm of your hand doesn’t have melanin (pores and skin pigment) or hair follicles. The only other location on the human body that lacks each of these is the sole from the foot. These two surfaces even have thicker pores and skin than other areas of the human body. https://bsearchblog.com/en/elevate-your-leathercraft-with-our-bag-making-hand-press-and-dies