With this type of leather, the hides of the animal used are not treated significantly. They have the hair of the animal removed, but they are not sanded. This can result in some minor flaws in the leather, but it also results in the most breathable leather a person can wear. Like a great pair of jeans, clothing made from this product actually gets more comfortable the more a person wears it, becoming softer and some say even more attractive as it gets older.