If properly cared for, a full-grain leather bag of the highest quality can last anywhere from 15 to 30 years and, in some cases, even its entire lifespan. The Full-Grain variety is the most long-lasting (20 years or more), while the Top-Grain variety is 10 to 15 years longer. On the other hand,UK leather bags made of "Genuine" or lower-quality Bonded leather tend to crack or peel after two to five years because they lack sufficient structural strength. It is possible to significantly extend the life of any leather bag by cleaning and conditioning it every three to six months.