Treated material helps prevent the growth of bacteria and fungus on the binder surface to protect the product. Locking round rings hold contents securely. Horizontal pockets on inside front and back covers for additional storage. Clear overlay allows for customization on all three sides. PVC-free, non-stick. Binder Type: Ring; Binder Style: View; Binder Size Capacity: 1"; Binder Sheet Capacity: 250.