1. High Transparency PVC Material: Made with special high-transparency PVC material. Seals and photos appear clear and beautiful, maximizing the appeal of your collection. 2. Excellent Durability: Features abrasion resistance and anti-yellowing treatment, making it resistant to degradation even after prolonged use. Maintains its beautiful condition for a long time. 3. Flexible Tri-Fold Structure: Tri-fold design that can be folded freely. Changes shape to suit the usage scene and can be stored compactly. 4. A7 Loose-Leaf Compatible: Compatible with standard A7 size loose-leaf refills. Pages inside can be freely replaced and added, allowing for customization to your liking.