Binder Pockets allow unpunched pages to be stored in the binder and can even help organize documents by color. The pockets are a great place to store loose items to avoid misplacing them. The holders include a hole-punched binding edge that fits in standard 3-ring binders. The durable holders are made of heavyweight, acid-free polypropylene, which eliminates photocopy transfer. The assortment of colors available creates sections in the binder and makes information easier to find. Assorted colors. Color randomly assigned to each order.