1. **Material Quality**: Made from various types of leather, such as full-grain, top-grain, or genuine leather. Full-grain leather is the highest quality.
2. **Durability**: Leather is naturally strong and resistant to wear, making the bag long-lasting.
3. **Patina Development**: Over time, leather develops a patina, giving it a unique, vintage look.
4. **Style**: Leather bags come in various styles (totes, messenger bags, backpacks, etc.), often with classic, timeless designs.
5. **Water Resistance**: Most leather bags are water-resistant to a degree, though some need treatment with waterproofing products.